Polycystic Kidney Disease 

Updated: Apr 26, 2018
Author: Roser Torra, MD, PhD; Chief Editor: Vecihi Batuman, MD, FASN 

Overview

Practice Essentials

Autosomal dominant polycystic kidney disease (ADPKD) is a multisystemic and progressive disorder characterized by cyst formation and enlargement in the kidney (see the image below) and other organs (eg, liver, pancreas, spleen). Up to 50% of patients with ADPKD require renal replacement therapy by 60 years of age.

Polycystic kidney. Polycystic kidney.

Signs and symptoms

Pain—in the abdomen, flank, or back—is the most common initial complaint, and it is almost universally present in patients with ADPKD. Dull aching and an uncomfortable sensation of heaviness may result from a large polycystic liver.

The pain can be caused by any of the following:

  • Enlargement of one or more cysts

  • Bleeding: May be confined inside the cyst or lead to gross hematuria with passage of clots or a perinephric hematoma

  • UTI (eg, acute pyelonephritis, infected cysts, perinephric abscess)

  • Nephrolithiasis and renal colic

  • Rarely, a coincidental hypernephroma

See Presentation for more detail.

Diagnosis

Examination in patients with ADPKD may demonstrate the following:

  • Hypertension: One of the most common early manifestations of ADPKD,[1, 2] in which increased diastolic BP is the rule; clinical course in ADPKD is usually more severe early on, then becomes less problematic as the renal insufficiency progresses

  • Palpable, bilateral flank masses: In advanced ADPKD

  • Nodular hepatomegaly: In severe polycystic liver disease

  • Rarely, symptoms related to renal failure (eg, pallor, uremic fetor, dry skin, edema)

Testing

Routine laboratory studies include the following:

  • Serum chemistry profile, including calcium and phosphorus

  • CBC count from cysts

  • Urinalysis

  • Urine culture

  • Uric acid determination

  • Intact PTH assay

Genetic testing may be performed, in which the major indication is for genetic screening in young adults with negative ultrasonographic findings who are being considered as potential kidney donors.[3]

Staging

Staging of renal failure is by GFR, as follows:

  • Stage 1: GFR above 90 mL/min

  • Stage 2: GFR 60-90 mL/min

  • Stage 3: GFR 30-60 mL/min

  • Stage 4: GFR 15-30 mL/min

  • Stage 5: GFR below 15 mL/min

Imaging studies

Radiologic studies used in the evaluation of ADPKD include the following:

  • Ultrasonography: Technique of choice for patients with ADPKD and for screening patients' family members; useful for exploring abdominal extrarenal features of ADPKD (eg, liver cysts, pancreatic cysts)

  • CT scanning: Not routine; useful in doubtful pediatric cases or in complicated cases (eg, kidney stone, suspected tumor)

  • MRI: Not routine; helpful in distinguishing renal cell carcinoma from simple cysts; criterion standard to help determine renal volume for clinical trials when testing drugs for ADPKD; best imaging tool for monitoring kidney size after treatment, as an indication of disease progress.

  • MRA: Not routine; preferred imaging technique for diagnosing ADPKD-related intracranial aneurysms

Ultrasonographic diagnostic criteria for ADPKD1 are as follows[4] :

  • At least 2 cysts in 1 kidney or 1 cyst in each kidney in an at-risk patient younger than 30 years

  • At least 2 cysts in each kidney in an at-risk patient aged 30-59 years

  • At least 4 cysts in each kidney for an at-risk patient aged 60 years or older

Ultrasonographic diagnostic criteria for ADPKD in patients with a family history but unknown genotype are as follows[5] :

  • Three or more (unilateral or bilateral) renal cysts in patients aged 15-39 years

  • Two or more cysts in each kidney in patients aged 30-59 years

Fewer than 2 renal cysts in the findings provides a negative predictive value of 100% and can be considered sufficient for ruling out disease in at-risk individuals older than 40 years.

Indications for MRA are as follows[6, 7] :

  • Family history of stroke or intracranial aneurysms

  • Development of symptoms suggesting an intracranial aneurysm

  • Job or hobby in which a loss of consciousness may be lethal

  • Past history of intracranial aneurysms

See Workup for more detail.

Management

Management of ADPKD includes the following:

  • Control blood pressure: Drugs of choice are ACEIs (eg, captopril, enalapril, lisinopril) or ARBs (eg, valsartan, telmisartan, losartan, irbesartan, candesartan, olmesartan)

  • Control abnormalities related to renal failure: Drugs to maintain electrolyte levels (eg, calcium carbonate, calcium acetate, sevelamer, lanthanum carbonate, calcitriol [possibly], diuretics, blood pressure medications)

  • Treat UTIs

  • Treat cyst infections: Gyrase inhibitors (eg, ciprofloxacin, chloramphenicol, clindamycin, levofloxacin); dihydrofolic acid inhibitors (TMX/SMP)

  • Treat hematuria: Possibly analgesic plus copious oral hydration

  • Reduce abdominal pain produced by enlarged kidneys

  • Prevent cardiac valve infection in patients with intrinsic valve disease

  • Reduce kidney function decline in adults at risk of rapidly progressive ADPKD (tolvaptan [Jynarque])

Surgical intervention in ADPKD includes the following:

  • Surgical drainage: Usually in conjunction with ultrasonographically guided puncture; in cases of infected renal/hepatic cysts not responding to conventional antibiotics

  • Open or fiberoptic-guided surgery: For excision/drainage of the outer walls of cysts to ablate symptoms

  • Nephrectomy: Last resort for pain control in patients with inaccessible cysts in the renal medullae; bilateral nephrectomy in patients with severe hepatic involvement

  • Partial hepatectomy: To manage massive hepatomegaly

  • Liver transplantation: In cases of portal hypertension due to polycystic liver or hepatomegaly with nonresectable areas

Patients with ADPKD who progress to end-stage renal disease may require the following procedures:

  • Hemodialysis

  • Peritoneal dialysis

  • Renal transplantation

See Treatment and Medication for more detail. For a discussion of ADPKD in children, see Pediatric Polycystic Kidney Disease.

Background

Autosomal dominant polycystic kidney disease (ADPKD) is one of the most common inherited disorders in humans. It is the most frequent genetic cause of renal failure in adults, accounting for 6-8% of patients on dialysis in the United States.

ADPKD is a multisystemic and progressive disorder characterized by the formation and enlargement of cysts in the kidney and other organs (eg, liver, pancreas, spleen). Clinical features usually begin in the third to fourth decade of life, but cysts may be detectable in childhood and in utero.[8]

 

 

Pathophysiology

The main feature of ADPKD is a bilateral progressive increase in the number of cysts, which may lead to ESRD. Hepatic cysts, cerebral aneurysms, and cardiac valvular abnormalities also may occur.[9, 10]

Although ADPKD is a systemic disease, it shows a focal expression because less than 1% of nephrons become cystic. In ADPKD, each epithelial cell within a renal tubule harbors a germ-line mutation, yet only a tiny fraction of the tubules develop renal cysts.

It is currently held that the cells are protected by the allele inherited from the parent without ADPKD. When this allele is inactivated by a somatic event (mutation or otherwise) within a solitary renal tubule cell, the cell divides repeatedly until a cyst develops, with an aberrant growth program causing endless expansion. The severity of ADPKD is thought to be a direct consequence of the number of times and the frequency with which this cystogenic process occurs within the kidneys over the life of the patient. However this hypothesis is hard to understand in neonatal cases.

The hyperplastic cells cause an out-pocketing of the tubule wall, with the formation of a saccular cyst that fills with fluid derived from glomerular filtrate that enters from the afferent tubule segment. Progressive expansion eventually causes most of the emerging cysts to separate from the parent tubule, leaving an isolated sac that fills with fluid by transepithelial secretion. This isolated cyst expands relentlessly as a result of continued proliferation of the mural epithelium together with the transepithelial secretion of sodium chloride and water into the lumen.

The expanding fluid-filled tumor masses elicit secondary and tertiary changes within the renal interstitium evinced by thickening and lamination of the tubule basement membranes, infiltration of macrophages, and neovascularization. Fibrosis within the interstitium begins early in the course of the disease.

Cellular proliferation and fluid secretion may be accelerated by cyclic adenosine monophosphate (cAMP) and growth factors, such as epidermal growth factor (EGF). In summary, cysts function as autonomous structures and are responsible for progressive kidney enlargement in ADPKD.

Approximately 85-90% of patients with ADPKD have an abnormality on the short arm of chromosome 16 (ie, ADPKD type 1 [ADPKD1]). A second defect, termed ADPKD type 2 (ADPKD2), is responsible for 10-15% of ADPKD cases and is found on the long arm of chromosome 4. A third candidate gene, GANAB (Glucosidase II Alpha Subunit), accounting for a very low number of ADPKD cases, has been recently described.[11]  

PKD1 and PKD2 are expressed in most organs and tissues of the human body. The proteins that are encoded by PKD1 and PKD2, polycystin 1 and polycystin 2, seem to function together to regulate the morphologic configuration of epithelial cells. The polycystins are expressed in development as early as the blastocyst stage and are expressed in a broad array of terminally differentiated tissues. The functions of the polycystins have been scrutinized to the greatest extent in epithelial tissues of the kidneys and liver and in vascular smooth muscle (see Etiology).

A decrease in urine-concentrating ability is an early manifestation of ADPKD. The cause is not known. Plasma vasopressin levels are increased; this increase may represent the body's attempt to compensate for the reduced concentrating capacity of the kidneys and could contribute to the development of renal cysts, hypertension, and renal insufficiency.[12]

Bleeding

Renal cysts in ADPKD are associated with excessive angiogenesis evinced by fragile vessels stretched across their distended walls. When traumatized, these vessels may leak blood into the cyst, causing it to expand rapidly, resulting in excruciating pain. If bleeding continues, then the cyst may rupture into the collecting system, causing gross hematuria. Alternatively, the cyst may rupture into the subcapsular compartment and eventually dissect through the renal capsule to fill the retroperitoneal space.

Etiology

ADPKD is a hereditary disorder. The pattern of inheritance is autosomal dominant. Because the disorder occurs equally in males and females, each offspring has a 50% chance of inheriting the responsible mutation and, hence, the disease.

ADPKD is a genetically heterogeneous condition that involves at least 2 genes. PKD1 is located on 16p13.3 and accounts for most ADPKD cases. PKD2 is located on 4q21-q22 and accounts for 15% of ADPKD cases.

Polycystin 1 and 2

PKD1 codes for a 4304–amino acid protein (polycystin 1). The function of polycystin 1 is not yet fully defined, but this protein interacts with polycystin 2 and is involved in cell cycle regulation and intracellular calcium transport. Polycystin 1 localizes in the primary cilia of renal epithelial cells, which function as mechanosensors and chemosensors.

PKD2 codes for a 968–amino acid protein (polycystin 2) that is structurally similar to polycystin 1 and co-localizes to the primary cilia of renal epithelial cells. It is a member of the family of voltage-activated calcium channels.

Polycystin 1 and polycystin 2 are highly conserved ubiquitous transmembrane proteins. In the kidney, they are located in the epithelial cells of the renal tubules—in particular, in the primary cilia at the luminal side of the tubules, as well as in other areas of the renal cell epithelium.

Polycystin 1 is a large protein with a long extracellular N-terminal region, 11 transmembrane domains, and a short intracellular C-terminal tail. Polycystin 2 is structurally related to the transient receptor potential (TRP) channel family, and it is known to function as a nonselective cation channel permeable to Ca2+.

Polycystin 1 and polycystin 2 form heteromeric complexes and colocalize in the primary cilium of renal epithelial cells. The primary cilium is a long, nonmotile tubular structure located in the apical surface of the epithelial cells in the renal tubules. Its function was unknown for a long time. However, studies now indicate that the primary cilium may be a mechanoreceptor that senses changes in apical fluid flow and that transduces them into an intracellular Ca2+ signaling response.

This model involves the participation of polycystin 1 as a mechanical sensor of ciliary bending induced by luminal fluid flow. Bending of the cilium would cause a conformational change in polycystin 1 that would, in turn, activate the polycystin 2–associated Ca2+ channel, increasing the intracellular Ca2+ concentration and triggering intracellular signaling pathways leading to normal kidney development.[13]

There is a genotype-phenotype correlation for PKD1, with truncating mutations causing a more severe phenotype than non-truncating ones.[14]

ADPKD1 is more severe than ADPKD2. The mean age of ESRD for patients with ADPKD1 is 53 years. The mean age of ESRD for patients with ADPKD2 is 74 years.

The genetic heterogeneity of ADKPD, and the possible contribution of modifier genes, may explain the wide clinical variability in this disease, both within and between families.[15]

Epidemiology

Worldwide, ADPKD affects approximately 4 to 7 million individuals and accounts for 7-15% of patients on renal replacement therapy.[16] In North America and Europe, ADPKD is responsible for 6-10% of ESRD cases. Approximately one per 800-1000 population carries a mutation for this condition. Approximately 85-90% of patients with ADPKD have ADPKD1; most of the remaining patients have ADPKD2.[17]

ADPKD is slightly more severe in males than in females, but the difference is not statistically significant.

Symptoms generally increase with age. Children very rarely present with renal failure from ADPKD.

Prognosis

The prognosis in patients with ADPKD covers a wide spectrum. Renal failure has been reported in children; conversely, individuals with ADPKD may live a normal lifespan without knowing that they have the disease. More typically, however, ADPKD causes progressive renal dysfunction, resulting in grossly enlarged kidneys and kidney failure by the fourth to sixth decade of life. There is an inverse association between the size of polycystic kidneys and the level of glomerular filtration.[18, 19]

An early study estimated that approximately 70% of patients with ADPKD would develop renal insufficiency if they survived to age 65 years. Currently, half of all patients with ADPKD require renal replacement therapy by age 60 years. Risk factors for progression include the following:

  • PKD1 genotype

  • Large kidneys

  • Several episodes of gross hematuria[20]

  • Severe and frequent kidney infections

  • Hypertension

  • Multiple pregnancies

  • Black racial background[17]

  • Male sex

The presence of more than one risk factor increases the risk of progression to end-stage renal disease (ESRD).

Although the 2 forms of ADPKD, ADPKD1 and ADPKD2, share similar clinical features, renal prognosis is strikingly different.[21, 22] ADPKD2 is a milder disease, based on the age of onset of ESRD. The median age of renal survival for individuals with ADPKD1 is 56 years, compared with 68 years in those with ADPKD2. Although ADPKD2 is milder than ADPKD1, it has an overall impact on survival and shortens life expectancy.

Cardiovascular pathology and infections account for approximately 90% of deaths in patients treated with hemodialysis or peritoneal dialysis and after renal transplantation. A rare cause of mortality is in ADPKD is subarachnoid hemorrhage from intracranial aneurysms.[23]

In a retrospective, observational study of 88 patients with ADPKD who died between 1981 and 1999, Rahman et al determined that almost half of the patients died of cardiovascular problems.[24] The median age of death was 60.5 years. Causes of death included the following:

  • Cardiovascular problems - 46.6% of patients

  • Infection - 15.9% of patients, with 42% of these deaths resulting from septicemia

  • Central nervous system disorders - 11.36% of patients, with 60% of these deaths caused by cerebrovascular events

  • Uremia - 2.2% of patients

  • Other, miscellaneous causes - 11.36%

The Mayo Clinic calculator for ADPKD is a useful tool for predicting disease progression. Recommendations for assessing rapid progression of ADPKD have been provided by European experts.[25]

Patient Education

Ensure that patients are aware that this disease is hereditary and that their children have a 50% chance of acquiring the disease. Patients should also understand that although several treatments are being tested, this disease currently has no cure. Only interventions that slow the progression of renal disease (eg, adequate blood pressure control) are of benefit. Hopefully, effective specific therapy will be available in a few years.

Prenatal diagnosis is available through DNA linkage studies, if enough family members cooperate, or through a mutation search. Suggest that family members who are not screened for ADPKD have annual blood pressure checks and urine screenings for hematuria.

 

Presentation

History

Pain—in the abdomen, flank, or back—is the most common initial complaint, and it is almost universally present in patients with autosomal dominant polycystic kidney disease (ADPKD). The pain can be caused by any of the following:

  • Enlargement of one or more cysts

  • Bleeding, which may be confined inside the cyst, or lead to gross hematuria with passage of clots or a perinephric hematoma

  • Urinary tract infection (eg, acute pyelonephritis, infected cysts, perinephric abscess)

  • Nephrolithiasis and renal colic

  • Rarely, a coincidental hypernephroma

In addition, patients with ADPKD may have abdominal pain related to definitively or presumably associated conditions. Dull aching and an uncomfortable sensation of heaviness may result from a large polycystic liver. Rarely, hepatic cysts may become infected, especially after renal transplantation.

Abdominal pain can also result from diverticulitis, which has been reported to occur in 80% of patients with ADPKD maintained on dialysis, probably from altered connective tissue. However, this rate has not been demonstrated to be higher than the rate among other patients on dialysis.

Patients with ADPKD may be at a higher risk of developing thoracic aortic aneurysms. Abdominal aortic aneurysms are not increased among these patients.

Pain may also develop for reasons completely unrelated to the underlying disease; thus, abdominal pain in patients with ADPKD may be a diagnostic challenge.

In addition to pain, other physical symptoms that patients with early-stage ADPKD may report include fatigue, breathlessness, weakness, and malaise.[26]

Hematuria

Hematuria frequently is the presenting manifestation and usually is self-limited, lasting 1 week or less. Polycystic kidneys are unusually susceptible to traumatic injury, with hemorrhage occurring in approximately 60% of individuals. Mild trauma can lead to intrarenal hemorrhage or bleeding into the retroperitoneal space accompanied by intense pain that often requires narcotics for relief.

Physical Examination

Hypertension is one of the most common early manifestations of ADPKD.[1, 2] Even when renal function is normal, hypertension has been found in 50-75% of patients.

The clinical course of hypertension in ADPKD is very unlike that of hypertension in chronic glomerulonephritis or tubulointerstitial nephropathies. In ADPKD, the hypertension is usually more severe early in the course of the disease and becomes less problematic as the renal insufficiency progresses. A rise in diastolic blood pressure is the rule in ADPKD.

Palpable, bilateral flank masses occur in patients with advanced ADPKD. Nodular hepatomegaly occurs in those with severe polycystic liver disease.

Symptoms related to renal failure (eg, pallor, uremic fetor, dry skin, edema) are rare upon presentation.

Complications

End-stage renal disease (ESRD) is the most frequent complication of ADPKD. The prevalence of hypertension increases with age, with a rate of approximately 85% when patients enter ESRD.

Polycystic liver disease

The presence of cysts in the liver, pancreas, and spleen is a well-known feature of polycystic liver disease, which is a frequent extrarenal manifestation of ADPKD.[9] Pain and infection are the only symptoms that occur from the presence of hepatic cysts. Most frequently, cysts are asymptomatic.

Polycystic liver disease belongs to a family of liver diseases characterized by an overgrowth of biliary epithelium and supportive connective tissue. It is characterized by multiple cysts that may be microscopic or can occupy most of the abdominal cavity. Liver size may range from normal to enlarged.

Women are more likely to have more and larger hepatic cysts than men; this correlates with estrogen exposure and increases with gravidity in women. Liver size in massive polycystic liver disease tends to stabilize after menopause. Hepatic cysts occur in almost 50% of affected patients. Cysts occur in approximately 20% of patients during the third decade of life and in 75% during the seventh decade of life. They are rare in children, and the frequency increases with age. Pancreatic cysts occur at a rate of 9% in patients older than 20 years.

Bilateral nephrectomy in patients with massively enlarged livers may cause portal hypertension. This typically manifests as severe ascites or esophageal varices. The enlarged liver may also cause malnutrition, and in such cases, patients may need a partial resection of the liver or hepatic transplantation.

Cerebral aneurysms

Cerebral aneurysms are among the most serious complications of ADPKD; they occur in 4-10% of patients with ADPKD. In the study by Rahman et al, the mortality rate from cerebrovascular events in ADPKD was approximately 7%.[24]

Rupture usually occurs in patients younger than 50 years who have uncontrolled hypertension; however, a stroke from hypertension and intracerebral hemorrhage is more common. There is no relationship between the risk of rupture and the severity of renal disease.

Nephrolithiasis

Nephrolithiasis occurs in 20-30% of patients with ADPKD. Consider this condition in patients with acute pain and hematuria. In contrast to kidney stones in the general population, which most often consist of calcium oxalate, uric acid stones form in as many as 50% of patients with ADPKD. Metabolic abnormalities (eg, decreased urinary citrate) contribute to uric acid stone formation.

Establishing a diagnosis by ultrasonogram is often difficult because of the presence of large cysts. An intravenous pyelogram or a CT scan is the preferred imaging modality.

 

DDx

Diagnostic Considerations

Problems to be considered in the differential diagnosis of autosomal dominant polycystic kidney disease include the following:

  • Acquired renal cystic disease

  • Autosomal recessive polycystic kidney disease

  • Medullary cystic disease

  • Orofaciodigital type II syndrome

  • Renal dysplasia

  • Simple renal cysts

  • Tuberous sclerosis

Differential Diagnoses

 

Workup

Approach Considerations

Ultrasonography is the procedure of choice in the workup of patients with autosomal dominant polycystic kidney disease (ADPKD). It is also ideal for screening patients' family members. Computed tomography (CT), magnetic resonance imaging (MRI), and magnetic resonance angiography (MRA) are useful in selected cases. For more information, see Imaging in Autosomal Recessive Polycystic Kidney Disease.

Other studies to perform include the following:

  • Serum chemistry profile, including calcium and phosphorus

  • Complete blood cell count

  • Urinalysis

  • Urine culture

  • Uric acid determination

  • Intact parathyroid hormone assay

An increased hematocrit may result from increased erythropoietin secretion from cysts. A decrease in urine-concentrating ability is an early manifestation of the disease. Microalbuminuria occurs in 35% of patients with ADPKD. However, nephrotic-range proteinuria is uncommon.

Urinary proteomic biomarkers may have the potential for diagnosis and prognosis of ADPKD. In a large clinical proteomic study, investigators reported that the performance of urinary peptidomic biomarker scores in ADPKD is superior to that of other biochemical markers in young patients with this disease and that proteomic profiling is potentially useful in the diagnosis and risk stratification of ADPKD.[27] In the study, urine samples from 1,048 patients were analyzed to characterize the urinary peptidomic pattern of patients with early stage ADPKD.[27]

Genetic testing

Genetic testing may be performed. The major indication for genetic screening is in young adults with negative ultrasonographic findings who are being considered as potential kidney donors.[3] Genetic testing by means of DNA linkage analysis has an accuracy rate greater than 95% for ADPKD1 and ADPKD2. Mutation screening is commercially available.

Staging by glomerular filtration rate

Staging of renal failure is as follows:

  • Stage 1 – Glomerular filtration rate (GFR) >90 mL/min

  • Stage 2 - GFR 60-90 mL/min

  • Stage 3 - GFR 30-60 mL/min

  • Stage 4 - GFR 15-30 mL/min

  • Stage 5 - GFR < 15 mL/min

Other studies

Intravenous urography was once widely used in the diagnosis of ADPKD. Among its disadvantages are that it involves contrast medium and it is diagnostic only in advanced-stage ADPKD when distortion of calyces has developed. It is no longer indicated to establish a diagnosis of the disease.

Barium enema may be used to help diagnose colonic diverticula. Doppler studies and 2-dimensional echocardiography are used to exclude mitral prolapse, which is often associated with ADPKD.

Screening for intracranial aneurysm

Intracranial aneurysms are at least twice as common in patients with ADPKD as in the general population.[28] On screening, intracranial aneurysms are found in approximately 10% of asymptomatic patients with ADPKD.[29] Indications for screening, which is done with time-of-flight MRA, include the following[28] :

  • Before major elective surgery
  • Central nervous system signs or symptoms (eg, nausea and vomiting, lethargy, photophobia, focal signs, seizure, transient ischemic attack, loss of consciousness)
  • Family history of intracranial aneurysm or intracranial hemorrhage
  • High-risk occupation (eg, airline pilot)
  • New-onset severe headache

Ultrasonography

Ultrasonography is the most widely used imaging technique to help diagnose ADPKD.[30] It can detect cysts from 1-1.5 cm. This study avoids the use of radiation or contrast material, is widely available, and is inexpensive. The sensitivity of ultrasonography for ADPKD1 is 99% for at-risk patients older than 20 years; however, false-negative results are more common in younger patients. Sensitivity for ADPKD2 is lower and is still not well defined.

Ultrasonography is also useful for exploring abdominal extrarenal features of ADPKD (eg, liver cysts, pancreatic cysts).The presence of hepatic or pancreatic cysts supports the diagnosis of ADPKD.

Ultrasonographic diagnostic criteria for ADPKD1 were established by Ravine et al in 1994 and are as follows[4] :

  • At least 2 cysts in 1 kidney or 1 cyst in each kidney in an at-risk patient younger than 30 years

  • At least 2 cysts in each kidney in an at-risk patient aged 30-59 years

  • At least 4 cysts in each kidney for an at-risk patient aged 60 years or older

Ultrasonographic diagnostic criteria for ADPKD in patients with a family history but unknown genotype were established by Pei et al in 2009 and are as follows[5] :

  • Three or more (unilateral or bilateral) renal cysts in patients aged 15-39 years

  • Two or more cysts in each kidney in patients aged 30-59 years

Fewer than 2 renal cysts in the findings provides a negative predictive value of 100% and can be considered sufficient for ruling out disease in at-risk individuals older than 40 years of age.

CT, MRI, and MRA

CT is more sensitive than ultrasonography and can detect cysts as small as 0.5 cm. However, it exposes the patient to radiation and is more expensive; therefore, it is not used routinely for diagnosis or for follow-up studies of ADPKD. CT may be useful in doubtful cases in children or in complicated cases (eg, kidney stone, suspected tumor).

MRI is more sensitive than either ultrasonography or CT scanning. It may be more helpful in distinguishing renal cell carcinoma from simple cysts.

MRI is the best imaging tool for monitoring kidney size after treatment to assess progress, and it is the criterion standard to help determine renal volume for clinical trials of drugs for ADPKD. However, it is not routinely used because it is expensive and tedious. It should not be used unless the patient is in a protocol or similar situation.

Spithoven et al reported that determining measured total kidney volume (TKV) by MRI and manual tracing took an average of 55 minutes, but a recently proposed MRI method for estimating TKV, eTKVellipsoid, required an average of only 5 minutes. In their comparison study, eTKVellipsoid performed relatively well compared with mTKV and could detect change in TKV over time.[31]

Magnetic resonance angiography (MRA) is the preferred imaging technique for diagnosing intracranial aneurysms (ICAs). It is used selectively rather than routinely. Indications for this study are as follows[6, 7] :

  • Family history of stroke or ICA

  • Development of symptoms suggesting an ICA

  • Job or hobby in which a loss of consciousness may be lethal

  • Past history of ICA

 

Treatment

Approach Considerations

In patients with autosomal dominant polycystic kidney disease (ADPKD), pharmacologic therapy is necessary to accomplish the following:

  • Control blood pressure; rigorous blood pressure control is recommended in early ADPKD[32]

  • Control abnormalities related to renal failure

  • Treat urinary tract infections

  • Treat hematuria

  • Reduce abdominal pain produced by enlarged kidneys

  • Slow kidney function decline

Patients with ADPKD who progress to end-stage renal disease may require hemodialysis, peritoneal dialysis, or renal transplantation. For more information, see Chronic Kidney Disease and Renal Transplantation.

In patients with heart murmurs, institute routine American Heart Association antibiotic prophylaxis.

Metabolic problems related to renal failure that need to be controlled include the following:

  • Hyperkalemia

  • Hyperphosphatemia

  • Hypocalcemia

  • Hyperparathyroidism

  • Metabolic acidosis

Management of intracranial aneurysms is influenced by their size and location; monitoring is usually sufficient for aneurysms that are less than 7 mm in diameter and are located in the anterior circulation, as these are less likely to rupture.[28] Rozenfeld and colleagues reported that patients with ADPKD who undergo treatment for intracranial aneurysms are especially likely to experience complications: compared with controls, patients with ADPKD experienced higher rates of iatrogenic hemorrhage or infarction, embolic infarction, and carotid artery dissection after endovascular coiling, and higher rates of iatrogenic hemorrhage or infarction after surgical clipping.[33]

Tolvaptan

Tolvaptan (Jynarque), a selective vasopressin V2-receptor antagonist, was approved in the United States in April 2018 to slow kidney function decline in adults at risk of rapidly progressing ADPKD. Approval was based on two phase 3 clinical trials.

Treatment with tolvaptan led to improvement in glomerular filtration rate (GFR) during the 1-year REPRISE (Replicating Evidence of Preserved Renal Function: an Investigation of Tolvaptan Safety and Efficacy in ADPKD) trial. The change from baseline in the estimated GFR (eGFR) was -2.34 mL/minute per 1.73 m2 in the tolvaptan group compared with -3.61 mL/min/1.73 m2 in the placebo group (P< 0.001).[51] In the extension trial (TEMPO 3:4) eGFR differences produced by the third year of the trial were maintained over the next 2 years of tolvaptan treatment.

The primary endpoint in the TEMPO 3:4 and TEMPO 4:4 studies was the intergroup difference for rate of change of total kidney volume (TKV). The trial met its prespecified primary endpoint of 3-year change in TKV (P< 0.0001). The difference in TKV between treatment groups mostly developed within the first year, the earliest assessment, with little further difference in years 2 and 3. In years 4 and 5 during the TEMPO 3:4 extension trial, both groups received tolvaptan and the difference between the groups in TKV was not maintained.[34, 52]

Diet and activity

Although a low-salt diet is recommended when hypertension or renal failure is present, no other special diet reportedly is of benefit.

Patients should avoid contact sports in which direct trauma to the back or abdomen is likely. This is especially important with larger, palpable kidneys in order to minimize the risk of rupture.

Blood Pressure Control

In patients with renal disease and moderately increased albuminuria, the goal is a blood pressure of 130/80 mm Hg or less.[53] If more than 1 g/day of urinary protein is present, the target blood pressure is less than 125/75 mm Hg. Achieving good blood pressure control helps slow the progression of renal disease.[36] A study by Patch et al showed that when intensity and coverage of antihypertensive therapy were increased, mortality decreased for patients with ADPKD.[37]

The drugs of choice for this condition are angiotensin-converting enzyme (ACE) inhibitors (eg, captopril, enalapril, lisinopril) or angiotensin II receptor blockers (ARBs) such as telmisartan, losartan, irbesartan, and candesartan. These agents remain the most recommended drugs to treat hypertension in patients with ADPKD, although studies of the renin-angiotensin-aldosterone system have not convincingly demonstrated that it plays an important role in its pathogenesis.[38] Calcium channel blockers are not recommended.

In patients with advanced renal disease, ACE inhibitors and ARBs can exacerbate renal failure or increase serum potassium levels. Therefore, these patients require regular monitoring of serum chemistry values.

Infectious and Other Disorders

Urinary tract infections (UTIs) occur in 30-50% of ADPKD patients and most frequently in women. Gram-negative bacteria are the most common pathogens.

Distinguishing between infections of the bladder, renal parenchyma, and cysts is important because the treatment for each condition is different. Treating infected cysts requires antibiotics that penetrate into the cyst. Useful agents are ciprofloxacin, trimethoprim-sulfamethoxazole, clindamycin, and chloramphenicol.

Hematuria

Hematuria is frequent in patients with ADPKD. It usually results from cyst rupture or stone passage. Instruct the patient to drink large amounts of water, to rest, and to take a pain killer if necessary. Hematuria is usually self-limited. Hospitalization is necessary if the patient is still bleeding after several days or if the amount of blood is substantial.

Abdominal pain from enlarged kidneys

Avoid nonsteroidal anti-inflammatory drugs (NSAIDs), because they can worsen renal function and potentiate hyperkalemia. Treatment involves surgical cyst decompression, which is effective for pain relief in 60-80% of patients. See Surgical Drainage, below.

Surgical Drainage

If infected renal or hepatic cysts do not respond to conventional antibiotic therapy, surgical drainage may be necessary. This procedure is usually performed with ultrasonographically guided puncture.[39]

Cysts may become large enough to cause abdominal discomfort or pain. Typically, acute pain is from cyst hemorrhage or an obstruction by a clot, stone, or infection.[40] When one or more cysts can be identified as causing the pain, the symptoms can often be abated by open- or fiberoptic–guided surgery to excise the outer walls and to drain them.

Approximately 25% of patients with the most severe pain do not gain relief from surgery or pharmacologic therapy with narcotics. These individuals usually have inaccessible cysts in the medullary portions of the kidneys. Nephrectomy is used as a last resort to control the pain in these patients. Nephrectomy is often necessary when there is not enough room for a kidney graft.

Severe polycystic liver disease can result in massive hepatomegaly (see image below). When the liver becomes so large that it prevents the patient from obtaining normal nutrition or causes severe abdominal discomfort, a surgical procedure is necessary. Surgical intervention may range from unroofing several cysts to a partial hepatectomy.

Polycystic kidney disease and massive polycystic l Polycystic kidney disease and massive polycystic liver disease.

Partial hepatectomy is difficult because of the characteristics of the polycystic liver. Only very expert surgeons should proceed with this surgical procedure.

When the polycystic liver causes portal hypertension or is very large with nonresectable areas, liver transplantation may be necessary.

Special attention should be paid when bilateral nephrectomy has to be carried out in patients with severe liver involvement. Several cases of refractory ascites after bilateral nephrectomy have been reported in these patients.

Consultations and Long-Term Monitoring

Consultations may be indicated under the following circumstances:

  • Nephrologist upon evidence of renal insufficiency, hypertension, microalbuminuria, or concentrating defect

  • Invasive radiologist for cyst sclerosis or drainage

  • General surgeon for nephrectomy, cyst decompression, unroofing, or surgical hepatic procedures

  • Neurosurgeon for intracranial aneurysms

  • Cardiologist for valvular abnormalities

Ensure that a patient with ADPKD who is nonhypertensive and has normal renal function undergoes blood testing and ultrasonography of the kidneys every 1-2 years. Schedule more frequent follow-up studies for patients with high blood pressure. Hypertension is common, occurring in as many as 50-70% of patients before the onset of renal failure. Patients with renal failure require more frequent monitoring, based on the severity of their condition.

 

Medication

Medication Summary

Tolvaptan (Jynarque), a selective vasopressin V2-receptor antagonist, was approved in the U.S. in April 2018 to slow kidney function decline in adults at risk of rapidly progressing ADPKD. Approval was based on several phase 3 clinical trials.[34, 51, 52]

The drugs of choice for hypertension related to ADPKD are angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs). Do not treat ADPKD-related abdominal pain with nonsteroidal anti-inflammatory drugs (NSAIDs) because of their potential nephrotoxic effect.

Cyst infections require gyrase inhibitors (eg, ciprofloxacin, chloramphenicol, clindamycin). Trimethoprim-sulfamethoxazole is also an effective antibiotic for reaching the inner cavity of the cyst.

Renal failure requires drugs to maintain electrolyte levels (eg, calcium carbonate, calcium acetate, sevelamer, lanthanum carbonate, calcitriol [possibly], diuretics, blood pressure medications). Approximately 62% of patients with renal insufficiency require at least 2 antihypertensive agents for optimal blood pressure control.

Vasopressin Antagonists

Class Summary

The selective vasopressin V2-receptor antagonist, tolvaptan, causes an increase in urine water excretion that results in an increase in free water clearance (aquaresis), a decrease in urine osmolality, and a resulting increase in serum sodium concentration.

Tolvaptan (Jynarque)

Indicated to slow kidney function decline in adults at risk of rapidly progressing autosomal dominant polycystic kidney disease (ADPKD). This indication is specific for Jynarque (ie, not Samsca) as the dosing and duration differs. Because of the potential for serious liver injury, Jynarque is available only through a restricted distribution program.

Angiotensin-Converting Enzyme Inhibitors

Class Summary

ACE inhibitors suppress the renin-angiotensin-aldosterone system.

Enalapril (Vasotec)

Enalapril is a competitive inhibitor of ACE. It reduces angiotensin II levels, decreasing aldosterone secretion.

Lisinopril (Prinivil, Zestril)

This agent prevents conversion of angiotensin I to angiotensin II, a potent vasoconstrictor, resulting in lower aldosterone secretion.

Captopril

Captopril prevents conversion of angiotensin I to angiotensin II, a potent vasoconstrictor, resulting in lower aldosterone secretion.

Angiotensin II Receptor Antagonists

Class Summary

ARBs interfere with the binding of formed angiotensin II to its endogenous receptor. These agents reduce blood pressure and proteinuria, protecting renal function and delaying onset of end-stage renal disease (ESRD).

Valsartan (Diovan)

Valsartan is a prodrug that produces direct antagonism of angiotensin II receptors. It displaces angiotensin II from the AT1 receptor and may lower blood pressure by antagonizing AT1-induced vasoconstriction, aldosterone release, catecholamine release, arginine vasopressin release, water intake, and hypertrophic responses.

Valsartan may induce more complete inhibition of the renin-angiotensin system than ACE inhibitors, it does not affect response to bradykinin, and it is less likely to be associated with cough and angioedema. It is for use in patients unable to tolerate ACE inhibitors.

Losartan (Cozaar)

Losartan is an ARB that blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II. It may induce a more complete inhibition of the renin-angiotensin system than ACE inhibitors, it does not affect the response to bradykinin, and it is less likely to be associated with cough and angioedema. It is used for patients unable to tolerate ACE inhibitors.

Candesartan (Atacand)

Candesartan blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II. It may induce more complete inhibition of renin-angiotensin system than ACE inhibitors, it does not affect response to bradykinin, and it is less likely to be associated with cough and angioedema. It is used in patients unable to tolerate ACE inhibitors.

Olmesartan (Benicar)

Olmesartan blocks the vasoconstrictor effects of angiotensin II by selectively blocking binding of angiotensin II to the AT-1 receptor in vascular smooth muscle. Its action is independent of pathways for angiotensin II synthesis.

Antibiotics

Class Summary

Empiric antimicrobial therapy must be comprehensive and should cover all likely pathogens in the context of the clinical setting.

Ciprofloxacin (Cipro)

Ciprofloxacin inhibits bacterial DNA synthesis and, consequently, growth. It is a fluoroquinolone with activity against pseudomonads, streptococci, methicillin-resistant Staphylococus aureus (MRSA), S epidermidis, and most gram-negative organisms, but no activity against anaerobes. Levofloxacin (Levaquin) overcomes many of these limitations. Continue treatment for at least 2 d (7-14 d typical) after signs and symptoms have disappeared.

Levofloxacin (Levaquin)

Levofloxacin inhibits growth of susceptible organisms by inhibiting DNA gyrase and promoting breakage of DNA strands.

Trimethoprim-sulfamethoxazole (Bactrim, Bactrim DS, Septra, Septra DS)

This agent inhibits bacterial growth by inhibiting synthesis of dihydrofolic acid.

Clindamycin (Cleocin)

Clindamycin inhibits bacterial growth, possibly by blocking dissociation of peptidyl tRNA from ribosomes, causing RNA-dependent protein synthesis to arrest.

Chloramphenicol

Chloramphenicol binds to 50S bacterial-ribosomal subunits and inhibits bacterial growth by inhibiting protein synthesis. It is effective against gram-negative and gram-positive bacteria.

Phosphate Binders

Class Summary

Administer phosphate binders to maintain phosphate levels in renal failure.

Calcium Acetate ( PhosLo, Eliphos)

Calcium acetate reduces the phosphorus load.

Lanthanum carbonate (Fosrenol)

Lanthanum is a noncalcium, nonaluminum phosphate binder indicated for reduction of high phosphorus levels in patients with ESRD. It directly binds dietary phosphorus in the upper GI tract, thereby inhibiting phosphorus absorption.

Sevelamer hydrochloride (Renagel, Renvela)

This polymeric phosphate binder for oral administration does not contain aluminum. Thus, aluminum intoxication is not a concern.

 

Questions & Answers

Overview

What is autosomal dominant polycystic kidney disease (ADPKD)?

What are the signs and symptoms of autosomal dominant polycystic kidney disease (ADPKD)?

What is included in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

What causes pain in autosomal dominant polycystic kidney disease (ADPKD)?

Which physical findings suggest autosomal dominant polycystic kidney disease (ADPKD)?

Which tests are performed in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of genetic testing in the diagnosis of autosomal dominant polycystic kidney disease (ADPKD)?

What are the stages of renal failure in autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of radiologic studies in the evaluation of autosomal dominant polycystic kidney disease (ADPKD)?

What are the ultrasonographic diagnostic criteria for autosomal dominant polycystic kidney disease type 1(ADPKD1)?

What are the ultrasonographic diagnostic criteria for autosomal dominant polycystic kidney disease (ADPKD) in patients with a family history but unknown genotype?

When can autosomal dominant polycystic kidney disease (ADPKD) be ruled out in at risk individuals older than 40 years?

What are the indications for MRA in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of surgery in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

Which procedures may be required for the treatment of autosomal dominant polycystic kidney disease (ADPKD) with end-stage renal failure?

What is autosomal dominant polycystic kidney disease (ADPKD)?

How is autosomal dominant polycystic kidney disease (ADPKD) characterized?

What is the pathophysiology of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of genetics in the pathophysiology of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of urine-concentration in the pathogenesis of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of renal bleeding in the pathogenesis of autosomal dominant polycystic kidney disease (ADPKD)?

What causes autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of polycystin 1 in the etiology of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of polycystin 2 in the etiology of autosomal dominant polycystic kidney disease (ADPKD)?

Where are polycystin 1 and polycystin 2 located in the kidneys?

What are the structures of polycystin 1 and polycystin 2 in autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of polycystin 1 and polycystin 2 interaction in the etiology of autosomal dominant polycystic kidney disease (ADPKD)?

Which genetic factor affects the severity of autosomal dominant polycystic kidney disease (ADPKD)?

How does the clinical manifestations of ADPKD1 differ from ADPKD2?

What is the prevalence of autosomal dominant polycystic kidney disease (ADPKD)?

How does the incidence of autosomal dominant polycystic kidney disease (ADPKD) vary among patient groups?

What is the prognosis of autosomal dominant polycystic kidney disease (ADPKD)?

What are the risk factors for progression of autosomal dominant polycystic kidney disease (ADPKD)?

What increases the risk for end-stage renal disease (ESRD) in autosomal dominant polycystic kidney disease (ADPKD)?

What is the difference in prognosis for ADPKD1 and ADPKD2?

What causes mortality in autosomal dominant polycystic kidney disease (ADPKD)?

What are the common cardiovascular causes of death in autosomal dominant polycystic kidney disease (ADPKD)?

What should be included in patient education for autosomal dominant polycystic kidney disease (ADPKD)?

What are screening recommendations for family members of patients with autosomal dominant polycystic kidney disease (ADPKD?)

Presentation

What are the signs and symptoms of autosomal dominant polycystic kidney disease (ADPKD)?

Which comorbid conditions may cause abdominal pain in patients with autosomal dominant polycystic kidney disease (ADPKD)?

What is the increased risk for aneurysm in autosomal dominant polycystic kidney disease (ADPKD)?

Why is abdominal pain a diagnostic challenge autosomal dominant polycystic kidney disease (ADPKD)?

Other than pain, what are the symptoms of early-stage autosomal dominant polycystic kidney disease (ADPKD)?

How is hematuria and hemorrhage characterized in autosomal dominant polycystic kidney disease (ADPKD)?

What is the prevalence of hypertension in autosomal dominant polycystic kidney disease (ADPKD)?

Which physical findings are characteristic of advanced or severe autosomal dominant polycystic kidney disease (ADPKD)?

Which physical findings are rare in autosomal dominant polycystic kidney disease (ADPKD)?

What is the most frequent complication autosomal dominant polycystic kidney disease (ADPKD)?

What are common extrarenal manifestations of autosomal dominant polycystic kidney disease (ADPKD)?

How is polycystic liver disease characterized in autosomal dominant polycystic kidney disease (ADPKD)?

Which patient groups are at highest risk for polycystic liver disease in autosomal dominant polycystic kidney disease (ADPKD)?

What causes portal hypertension in autosomal dominant polycystic kidney disease (ADPKD)?

What is the prevalence of cerebral aneurysms in autosomal dominant polycystic kidney disease (ADPKD)?

What is the cause of cerebral aneurysms rupture autosomal dominant polycystic kidney disease (ADPKD)?

What are the signs and symptoms of nephrolithiasis in autosomal dominant polycystic kidney disease (ADPKD)?

How is nephrolithiasis diagnosed in autosomal dominant polycystic kidney disease (ADPKD)?

DDX

Which conditions should be included in the differential diagnoses of autosomal dominant polycystic kidney disease (ADPKD)?

What are the differential diagnoses for Polycystic Kidney Disease?

Workup

What is the role of imaging in the diagnosis of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of lab studies in the diagnosis of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of urinary proteomic biomarkers in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of genetic testing in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

How is renal failure staged in autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of IV urography in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of barium enema in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

When should patients with autosomal dominant polycystic kidney disease (ADPKD) be screened for intracranial aneurysms?

What is the role of ultrasonography in the diagnosis of autosomal dominant polycystic kidney disease (ADPKD)?

How are the extrarenal features of autosomal dominant polycystic kidney disease (ADPKD) assessed?

What are the ultrasonographic diagnostic criteria for ADPKD1?

What are the ultrasonographic diagnostic criteria for autosomal dominant polycystic kidney disease (ADPKD) in patients with a family history but unknown genotype?

What is the role of CT scanning in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of MRI in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of magnetic resonance angiography (MRA) in the workup of autosomal dominant polycystic kidney disease (ADPKD)?

Treatment

What is the role of pharmacologic therapy in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

What are the treatment options for end-stage renal disease in autosomal dominant polycystic kidney disease (ADPKD)?

When is antibiotic prophylaxis indicated in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

Which metabolic conditions need to be managed in autosomal dominant polycystic kidney disease (ADPKD)?

How are intracranial aneurysms managed in autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of tolvaptan in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

Which dietary modifications are beneficial in autosomal dominant polycystic kidney disease (ADPKD)?

What activity restrictions are beneficial in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

How is blood pressure managed in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

Which drugs are used to treat blood pressure in autosomal dominant polycystic kidney disease (ADPKD?)

What are considerations with the use of ACE inhibitors and ARBs in patients with autosomal dominant polycystic kidney disease (ADPKD)?

What is the prevalence of urinary tract infections (UTIs) in autosomal dominant polycystic kidney disease (ADPKD)?

Why must infections of the bladder, renal parenchyma, and cysts be differentiated in autosomal dominant polycystic kidney disease (ADPKD)?

How is hematuria treated in autosomal dominant polycystic kidney disease (ADPKD)?

How is abdominal pain treated in autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of surgery in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

What is the role of nephrectomy in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

How is hepatomegaly treated in patient with autosomal dominant polycystic kidney disease (ADPKD)?

How should a polycystic liver be treated in autosomal dominant polycystic kidney disease (ADPKD)?

What are possible complications of bilateral nephrectomy in autosomal dominant polycystic kidney disease (ADPKD)?

Which specialist consultations are needed for the management of autosomal dominant polycystic kidney disease (ADPKD)?

What are the long-term monitoring protocols for autosomal dominant polycystic kidney disease (ADPKD)?

Medications

What are the indications for use of tolvaptan in the treatment of autosomal dominant polycystic kidney disease (ADPKD)?

What is the drug of choice for managing hypertension in autosomal dominant polycystic kidney disease (ADPKD)?

What are the medications used to manage cyst infections in autosomal dominant polycystic kidney disease (ADPKD)?

Which medications are used to maintain electrolyte levels in autosomal dominant polycystic kidney disease (ADPKD)?

Which medications in the drug class Phosphate Binders are used in the treatment of Polycystic Kidney Disease?

Which medications in the drug class Antibiotics are used in the treatment of Polycystic Kidney Disease?

Which medications in the drug class Angiotensin II Receptor Antagonists are used in the treatment of Polycystic Kidney Disease?

Which medications in the drug class Angiotensin-Converting Enzyme Inhibitors are used in the treatment of Polycystic Kidney Disease?

Which medications in the drug class Vasopressin Antagonists are used in the treatment of Polycystic Kidney Disease?