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Radiation Cystitis Workup

  • Author: Nicolas A Muruve, MD, FACS, FRCSC; Chief Editor: Edward David Kim, MD, FACS  more...
 
Updated: Nov 09, 2014
 

Approach Considerations

Radiation cystitis can mimic many different diseases. Neoplasia, urinary tract infection, and stone disease display similar findings. Consequently, a complete evaluation of the urinary tract is required. The initial evaluation should include the following:

  • Urinalysis to assess for hematuria and pyuria and to measure urine pH
  • Urine culture to confirm or rule out infection
  • Urinary cytology to screen for tumor

If the patient has hematuria, a complete blood count (CBC) is required to assess hemoglobin, hematocrit, and adequate platelet count. Gross hematuria is an indication to evaluate volume status, coagulation status, and the need for red blood cell (RBC) transfusion. Cystoscopy and renal imaging are also indicated to rule out other possible causes of genitourinary (GU) bleeding. Prothrombin time (PT) and activated partial thromboplastin time (aPTT) are needed to rule out coagulopathies if the patient is bleeding.

A white blood cell (WBC) count is necessary to assess for infection if the patient is febrile. Electrolytes, blood urea nitrogen (BUN), and creatinine levels are needed to assess renal function; obstructive uropathy may result from stricturing of the urinary tract and poor emptying. Urodynamics may be required if a patient presents with more complicated symptoms, but most symptoms can be evaluated by a thorough history and physical examination.

Biopsy

Avoid bladder biopsy because it may cause persistent bleeding or even fistula formation. However, judicious use of bladder biopsies may be indicated if a suspicious lesion or recurrent tumor is suggested.

Follow-up

Follow-up care for radiation cystitis is generally supportive. Symptoms can be recurrent or even persistent, as in the case of dysfunctional voiding. Because symptomatic manifestations of radiation cystitis can occur many years after primary radiation therapy, regular clinical follow-up care and good communication with patients are essential.

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Urodynamic Studies

Urodynamic studies are needed only when the diagnosis remains unclear after the history and physical examination. Urodynamics can help to assess for decreased bladder volume, postvoid residual urine, and detrusor instability. All are potentially present in radiation cystitis but are not specific for the disease.

Reported findings in acute cases include the following:

  • Detrusor instability (40-50% of patients)
  • Decreased peak flow rate
  • Decreased bladder compliance
  • Decreased bladder volume (approximately 20% volume reduction)

After the acute phase has passed (6mo), most bladder parameters return to normal. Some authors report a persistent loss of bladder compliance; however, it is not significantly different from that in control subjects.

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Cystoscopy

Cystoscopy is used to confirm the diagnosis and to rule out other conditions, such as bladder cancer or other recurrent metastatic tumors. Cystoscopy can be combined with retrograde pyelography, if needed.

On cystoscopy (see the images below), acute radiation injury is characterized by changes such as the following:

  • Telangiectasia
  • Diffuse erythema
  • Prominent submucosal vascularity
  • Mucosal edema
    Cystoscopic view of a bladder showing the neovascu Cystoscopic view of a bladder showing the neovascularity and telangiectasia of radiation cystitis.
    Cystoscopic view of a bladder showing the neovascu Cystoscopic view of a bladder showing the neovascularity and telangiectasia of radiation cystitis.

Cystoscopic findings in chronic radiation injury can be similar to those in acute injury, with areas of extreme pallor between erythematous areas and petechiae (see the image below).

Cystoscopic view of a radiated bladder showing are Cystoscopic view of a radiated bladder showing areas of neovascularization next to an area of pallor; the pallor was caused by increased collagen deposition. In such cases, the collagen prevents new vessels from forming in injured areas and contributes to ischemia.
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Imaging Studies

Imaging studies may consist of intravenous pyelography (IVP), CT urography, or renal ultrasonography. IVP is useful to evaluate anatomic abnormalities of the GU tract (eg, stricturing, fistula formation). If hematuria is present, IVP or CT urography is needed to rule out other causes of bleeding, such as calculus disease and neoplasia. As an alternative, ultrasonography can be used to assess for hydronephrosis due to scarring, renal tumors (as another cause of bleeding), and calculus disease.

CT scanning may also help in the diagnosis of bladder fistulas. Findings in patients with fistulas include the following[7] :

  • Intravesical air (90%)
  • Passage of orally or rectally administered contrast medium into the bladder (20%)
  • Focal bladder-wall thickening (90%)
  • Thickening of adjacent bowel wall (85%)
  • Extraluminal mass that often contains air (75%)
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Contributor Information and Disclosures
Author

Nicolas A Muruve, MD, FACS, FRCSC Associate Staff, Department of Urology, Cleveland Clinic Florida

Nicolas A Muruve, MD, FACS, FRCSC is a member of the following medical societies: American College of Surgeons, Society of Urologic Oncology, Canadian Urological Association, American Society of Transplant Surgeons, American Urological Association, Royal College of Physicians and Surgeons of Canada

Disclosure: Nothing to disclose.

Chief Editor

Edward David Kim, MD, FACS Professor of Surgery, Division of Urology, University of Tennessee Graduate School of Medicine; Consulting Staff, University of Tennessee Medical Center

Edward David Kim, MD, FACS is a member of the following medical societies: American College of Surgeons, Tennessee Medical Association, Sexual Medicine Society of North America, American Society for Reproductive Medicine, American Society of Andrology, American Urological Association

Disclosure: Serve(d) as a director, officer, partner, employee, advisor, consultant or trustee for: Repros.

Acknowledgements

Michael Grasso III, MD Director of Endourology, Lenox Hill Hospital; Professor and Vice Chairman, Department of Urology, New York Medical College

Michael Grasso III, MD is a member of the following medical societies: American Medical Association, American Urological Association, Endourological Society, Medical Society of the State of New York, National Kidney Foundation, Société Internationale d'Urologie (International Society of Urology), and Society of Laparoendoscopic Surgeons

Disclosure: Karl Storz Endoscopy Consulting fee Consulting; Boston Scientific Consulting fee Consulting; Cook Urologic Consulting fee Consulting

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Medscape Salary Employment

Dan Theodorescu, MD, PhD Paul A Bunn Professor of Cancer Research, Professor of Surgery and Pharmacology, Director, University of Colorado Comprehensive Cancer Center

Dan Theodorescu, MD, PhD is a member of the following medical societies: American Cancer Society, American College of Surgeons, American Urological Association, Medical Society of Virginia, Society for Basic Urologic Research, and Society of Urologic Oncology

Disclosure: Key Genomics Ownership interest Co-Founder-50% Stock Ownership

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Cystoscopic view of a bladder showing the neovascularity and telangiectasia of radiation cystitis.
Cystoscopic view of a bladder showing the neovascularity and telangiectasia of radiation cystitis.
Cystoscopic view of a radiated bladder showing areas of neovascularization next to an area of pallor; the pallor was caused by increased collagen deposition. In such cases, the collagen prevents new vessels from forming in injured areas and contributes to ischemia.
 
 
 
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