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Osteoporosis Clinical Presentation

  • Author: Monique Bethel, MD; Chief Editor: Herbert S Diamond, MD  more...
 
Updated: Jun 16, 2016
 

History

Keep in mind that osteoporosis occurs in many people who have few or no risk factors for this condition. Often, patients who have not sustained a fracture do not report symptoms that would alert the clinician to suspect a diagnosis of osteoporosis; thus, this disease is a "silent thief" that generally does not become clinically apparent until a fracture occurs.

Screening at-risk populations is, therefore, essential; unfortunately, many women are not receiving proper screening or treatment for osteoporosis, which, in turn, may result in improper management of this disease and its related complications.[89] For example, the existence of a disorder in a patient known to cause secondary osteoporosis—such as rheumatoid arthritis, celiac disease, or Crohn disease—should increase a clinician’s suspicion that osteoporosis may be present and that screening may be indicated.

Multiple risk factors exist for osteoporosis. The National Osteoporosis Foundation (NOF) has categorized these risk factors into two categories: nonmodifiable and modifiable. Nonmodifiable risk factors include the following:

  • Personal history of fracture as an adult
  • History of fracture in a first-degree relative
  • White race
  • Advanced age
  • Female sex
  • Dementia
  • Poor health or fragility

Potentially modifiable risk factors include the following:

  • Current cigarette smoking
  • Low body weight (< 127 lb)
  • Estrogen deficiency such as that caused by early menopause (age < 45 years) or bilateral ovariectomy and prolonged premenopausal amenorrhea (>1 year)
  • Low lifelong calcium intake
  • Alcoholism [63]
  • Impaired eyesight despite adequate correction
  • Recurrent falls
  • Inadequate physical activity
  • Poor health or frailty

Assessment of fracture risk

A thorough history should be obtained to screen for and identify the presence of known risk factors for osteoporosis and osteoporotic fracture. Specifically, the history should focus on the following[90, 91] :

  • Age (>50 years), sex (female), and race (white or Asian) [90] ; the US Preventive Services Task Force (USPSTF) recommendations include screening for osteoporosis in women aged 65 years or older and in younger women with a fracture risk that is the same or greater than that of a 65-year-old white woman who has no additional risk factors [91]
  • Family history of osteoporosis, particularly maternal history of fractures
  • Reproductive factors, especially regarding early menopause and estrogen replacement therapy: postmenopausal women are at high risk, as are women who have undergone hysterectomy and oophorectomy
  • Hypogonadal states: men with hypogonadism secondary to any genetic or other conditions are at higher risk [90] ; the USPSTF notes that there is insufficient current evidence to assess the risk versus benefit of screening for osteoporosis in men [91]
  • Smoking: smokers are at higher risk
  • Alcohol consumption
  • Low levels of physical activity: immobility increases the risk [56] ; spinal cord injury and stroke cause physical impairment and are common causes of immobility
  • Strenuous exercise that results in amenorrhea (such as that which occurs in marathon runners)
  • Calcium and vitamin D intake
  • History of low-trauma "fragility" fracture in patients aged 40 years or older: a fragility fracture is defined as a fracture due to trauma that would not normally cause fracture (a force equal to or less than that resulting from a fall from standing height)
  • Signs of vertebral fracture (see below)
  • Coexisting medical conditions associated with bone loss
  • Medications associated with bone loss
  • Risk factors for falls in older patients: these include poor balance, orthostatic hypotension, weakness of the lower extremity muscles and deconditioning, use of medications with sedative effects, poor vision or hearing, and cognitive impairment

FRAX tool

Although the USPSTF did not find any studies that assessed effects of the use of risk prediction instruments on patient outcomes, either alone or in combination with bone measurement tests, there are many validated instruments for predicting the risk for low bone mineral density (BMD) in postmenopausal women; few of these, however, have been validated for use in men.[91]

The Fracture Risk Assessment (FRAX) tool, accessible to healthcare providers and patients, is a validated instrument used to estimate 10-year risks for fractures, including those for black, Asian, and Hispanic women.[81] A 65-year-old white woman with no other risk factors has a 9.3% 10-year risk for any osteoporotic fracture. Generally, estimated fracture risks in nonwhite women are lower than those for white women of the same age.

White women between the ages of 50 and 64 years with ≥10-year fracture risks based on specific risk factors include the following persons[91] :

  • A 50-year-old current smoker with a body mass index (BMI) less than 21 kg/m 2, daily alcohol use, and parental fracture history
  • A 55-year-old woman with a parental fracture history
  • A 60-year-old woman with a BMI less than 21 kg/m 2 and daily alcohol use
  • A 60-year-old current smoker with daily alcohol use

Differentiating fracture types by history

Patients with acute insufficiency fractures may report a history of minimal or no trauma resulting in pain. They may report a fall from a standing or sitting position. Patients with compression fractures resulting in thoracic kyphosis may report iliocostal friction with associated abdominal protrusion, decreased tolerance for oral intake, and breathing difficulties. Patients with hip, pelvic, or sacral fractures may report pain that is worsened with weight-bearing.

Patients who have sustained a vertebral compression fracture may note progressive kyphosis with loss of height. They may also present with an episode of acute back pain after bending, lifting, or coughing. It should be noted, however, that two thirds of vertebral fractures are asymptomatic.

With respect to those vertebral fractures that are painful, typical subjective information may include the following:

  • The episode of acute pain may follow a fall or minor trauma
  • Pain is localized to a specific, identifiable, vertebral level in the midthoracic to lower thoracic or upper lumbar spine
  • The pain is described variably as sharp, nagging, or dull; movement may exacerbate pain; in some cases, pain radiates to the abdomen
  • Pain is often accompanied by paravertebral muscle spasms exacerbated by activity and decreased by lying supine
  • Patients often remain motionless in bed because of fear of causing an exacerbation of pain
  • Acute pain usually resolves after 4-6 weeks; in the setting of multiple fractures with severe kyphosis, the pain may become chronic

Patients who have sustained a hip fracture may experience the following:

  • Pain in the groin, posterior buttock, anterior thigh, medial thigh, and/or medial knee during weight-bearing or attempted weight-bearing of the involved extremity
  • Diminished hip range of motion (ROM), particularly internal rotation and flexion
  • External rotation of the involved hip while in the resting position

Patients with osteoporosis may report lactose intolerance and celiac sprue. Celiac sprue has been shown to be associated with osteoporosis in approximately 5% of cases.

Next

Physical Examination

Patients with suspected osteoporosis should undergo a comprehensive physical examination. The physical examination should begin with an inspection of the patient. Height measurement with a stadiometer at each visit may be useful. Examination of active and passive range of motion (ROM) assists in determining whether spine, hip, wrist, or other osseous pathology may be present. A thorough neurologic examination is essential to rule out spinal cord and/or peripheral nerve compromise.

The examination may elicit pain, or the patient may be pain free. Thoracic kyphosis may be present secondary to vertebral compression fractures, a dowager hump, and a history of loss of height. Patients may have an associated scoliosis.

Areas of concern include the following:

  • A history of loss of height
  • Low body weight (body mass index < 19 kg/m 2)
  • Signs that might indicate existing osteoporosis (eg, kyphosis or dowager hump; point tenderness over a vertebra or other suspected fracture site)
  • Signs suggestive of secondary osteoporosis
  • Signs in older patients that may indicate increased fall risk (eg, difficulty with balance or gait, orthostatic hypotension, lower-extremity weakness, poor vision or hearing, cognitive impairment)

A 10-year longitudinal study assessed the Timed Up and Go (TUG) test performance (a validated predictor of falling) and hip area BMD (bone mineral density calculated using bone area as opposed to bone volume). Using data from 1126 women (mean age, 75 years), the study noted that risks of nonvertebral fracture and hip fracture were significantly higher among those who had slow TUG test performance and normal hip BMD or both slow TUG test performance and low hip BMD. These results suggest that the TUG test is an independent risk factor for incident nonvertebral fracture; this inexpensive physical assessment may be beneficial in screening patients with increased risk of fracture.[92]

Signs of fracture

Patients with vertebral compression fractures may demonstrate a thoracic kyphosis with an exaggerated cervical lordosis (dowager hump). This is followed by a loss of lumbar lordosis. After each episode of vertebral compression fracture and progressive kyphosis, the patient's height may decrease by 2-3 cm.

Patients with acute vertebral fractures may have point tenderness over the involved vertebrae. Palpation of the spinous processes often does not aid the examiner in localizing point tenderness, but percussion may be helpful in acute or subacute vertebral compression fractures.

Patients with hip fractures may have severe pain with ambulation. A FABER (ie, flexion in abduction and external rotation) hip joint test may reveal limited ROM with end-range pain. Patients with hip fractures may show decreased weight-bearing on the fractured side or an antalgic gait pattern.

Patients with pubic and sacral fractures may report marked pain with ambulation and tenderness to palpation, percussion, or both. Furthermore, patients with sacral fractures may have pain with physical examination techniques used to assess the sacroiliac joint, such as the FABER, Gaenslen, or squish test.

Fractures in other parts of the body, including the distal radius and humerus, are typically painful and result in limited range of motion of the involved joint.

Signs of collagen defects

Patients with osteoporosis may have physical findings consistent with subtle collagen defects. These include a short fifth digit, dentinogenesis imperfecta, hyperlaxity, hearing loss, pes planus, bunions, and blue sclerae.

Balance difficulties

Patients with osteoporosis are known to have decreased balance, possibly secondary to differences in balance control strategies and sway amplitude. Patients may have difficulty performing tandem gait and performing single limb stance. Poor balance may be noted particularly in patients with severe kyphosis resulting from vertebral compression fractures because their altered center of gravity makes ambulation with a stable base of support difficult for them.[1]

Fractures are the most common and serious complication of osteoporosis. Patients with osteoporosis are at high risk for recurrent fractures of the hips, vertebrae, ribs, and wrists.

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Next

Screening in Men

Although routinely screening men for osteoporosis is not as widespread a practice as that of screening in women, the US Preventive Services Task Force (USPSTF) indicates that using bone measurement tests in men may not only help to detect this disease but also prevent its associated burden of fractures and fracture-related illness.[9]

In weighing the risk versus benefit of screening men, clinicians should consider that osteoporosis is a preventable condition and that the potential harm in screening is likely to be small and mostly due to cost, such as that required to increase the number of dual-energy x-ray absorptiometry (DXA) scanners available for screening.[9] In addition, assuming that the risk versus benefit of therapy for osteoporosis is similar for men and women, the men who are most likely to benefit from screening would be those with a 10-year risk for osteoporotic fracture that is equal to or greater than that for 65-year-old white women who have no additional risk factors.[9] It is important to note, however, that there is insufficient current evidence for assessing the risk versus benefit of screening for osteoporosis in men.

The American College of Physicians (ACP) has similar recommendations for screening of osteoporosis in men, including periodic evaluation of risk factors in older men before age 65 years (particularly men who do not choose to be screened) and obtaining DXA for men at increased risk for the disease who are candidates for drug therapy.[93] Risk factors for osteoporosis in men include the following[93] :

  • Age older than 70 years
  • Low body weight (body mass index [BMI] < 20 to 25 kg/m 2)
  • Greater than 10% weight loss (relative to the usual young or adult weight or weight loss in recent years)
  • Physical inactivity
  • Corticosteroid use
  • Androgen deprivation therapy
  • Previous fragility fracture

Like the USPSTF, the ACP recommends further research to assess osteoporosis screening tests in men, to determine whether risk factors for osteoporosis in women also apply to men.[94]

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Contributor Information and Disclosures
Author

Monique Bethel, MD Resident Physician, Department of Internal Medicine, Georgia Regents University

Disclosure: Nothing to disclose.

Coauthor(s)

Kristine M Lohr, MD, MS Professor, Department of Internal Medicine, Interim Chief, Division of Rheumatology, Director, Rheumatology Training Program, University of Kentucky College of Medicine

Kristine M Lohr, MD, MS is a member of the following medical societies: American College of Physicians, American College of Rheumatology

Disclosure: Nothing to disclose.

Laura D Carbone, MD, MS, FACP Professor, Department of Internal Medicine, Section Chief of Rheumatology, Georgia Regents University and Charlie Norwood Veterans Affairs Medical Center

Laura D Carbone, MD, MS, FACP is a member of the following medical societies: Alpha Omega Alpha, American College of Physicians, American College of Rheumatology, American Medical Womens Association, American Society for Bone and Mineral Research, International Society for Clinical Densitometry, Society of General Internal Medicine

Disclosure: Nothing to disclose.

Wambui Machua, MD Fellow, Department of Internal Medicine, Division of Rheumatology, Georgia Regents University

Wambui Machua, MD is a member of the following medical societies: American College of Physicians, American College of Rheumatology, National Medical Association, Georgia Society of Rheumatology

Disclosure: Nothing to disclose.

Chief Editor

Herbert S Diamond, MD Visiting Professor of Medicine, Division of Rheumatology, State University of New York Downstate Medical Center; Chairman Emeritus, Department of Internal Medicine, Western Pennsylvania Hospital

Herbert S Diamond, MD is a member of the following medical societies: Alpha Omega Alpha, American College of Physicians, American College of Rheumatology, American Medical Association, Phi Beta Kappa

Disclosure: Nothing to disclose.

Acknowledgements

Michael T Andary, MD, MS Professor, Residency Program Director, Department of Physical Medicine and Rehabilitation, Michigan State University College of Osteopathic Medicine

Michael T Andary, MD, MS is a member of the following medical societies: American Academy of Physical Medicine and Rehabilitation, American Association of Neuromuscular and Electrodiagnostic Medicine, American Medical Association, and Association of Academic Physiatrists

Disclosure: Allergan Honoraria Speaking and teaching; Pfizer Honoraria Speaking and teaching

Harris Gellman, MD Consulting Surgeon, Broward Hand Center; Voluntary Clinical Professor of Orthopedic Surgery and Plastic Surgery, Departments of Orthopedic Surgery and Surgery, University of Miami, Leonard M Miller School of Medicine

Harris Gellman, MD is a member of the following medical societies: American Academy of Medical Acupuncture, American Academy of Orthopaedic Surgeons, American Orthopaedic Association, American Society for Surgery of the Hand, and Arkansas Medical Society

Disclosure: Nothing to disclose.

Elliot Goldberg, MD Dean of the Western Pennsylvania Clinical Campus, Professor, Department of Medicine, Temple University School of Medicine

Elliot Goldberg, MD is a member of the following medical societies: Alpha Omega Alpha, American College of Physicians, and American College of Rheumatology

Disclosure: Nothing to disclose.

Coburn Hobar, MD Clinician in Rheumatology, Hobar Health and Wellness, and Anti-Aging & Wellness Center of Sarasota

Coburn Hobar, MD is a member of the following medical societies: American Academy of Anti-Aging Medicine and American College of Rheumatology

Disclosure: Nothing to disclose.

Dana Jacobs-Kosmin, MD, FACP Attending Physician, Department of Medicine, Division of Rheumatology, Einstein Medical Center; Clinical Assistant Professor of Medicine, Jefferson Medical College of Thomas Jefferson University

Dana Jacobs-Kosmin, MD, FACP is a member of the following medical societies: American College of Physicians, American College of Rheumatology, and American Medical Association

Disclosure: Nothing to disclose.

Robert J Kaplan, MD James E Van Zandt VA Medical Center, Staff Physician, Department of Rehabilitation Medicine

Robert J Kaplan, MD is a member of the following medical societies: American Academy of Physical Medicine and Rehabilitation

Disclosure: Nothing to disclose.

Joseph M Lane, MD  Professor of Orthopedic Surgery, Weill Medical College of Cornell University; Chief, Metabolic Bone Disease Service, Hospital for Special Surgery

Joseph M Lane, MD is a member of the following medical societies: American Academy of Orthopaedic Surgeons, American Association of University Professors, American Federation for Aging Research, American Orthopaedic Association, American Society for Bone and Mineral Research, Association of Bone and Joint Surgeons, Medical Society of the State of New York, Musculoskeletal Tumor Society, National Osteoporosis Foundation, North American Spine Society, and Orthopaedic Research Society

Disclosure: Lilly; Aventis; Novartis; Warner Chilcott; Biomimetics; Zimmer; DFine; Innovative Solutions; Honoraria Speaking and teaching; Graftys; Bone Technologies SA; CollPlant Consulting fee Consulting

David Lenrow, MD Vice Chair of Clinical Services, Medical Director, Erdman Clinic; Associate Professor, Department of Rehabilitation Medicine, University of Pennsylvania at Philadelphia

David Lenrow, MD is a member of the following medical societies: American Academy of Physical Medicine and Rehabilitation and American Medical Association

Disclosure: Nothing to disclose.

Julie Lin, MD Assistant Professor, Department of Rehabilitation Medicine, Weill Medical College of Cornell University; Assistant Attending Physiatrist, Physiatry Department, Hospital for Special Surgery

Julie Lin, MD is a member of the following medical societies: American Academy of Physical Medicine and Rehabilitation, American Association of Neuromuscular and Electrodiagnostic Medicine, American Medical Association, North American Spine Society, and Physiatric Association of Spine, Sports and Occupational Rehabilitation

Disclosure: Nothing to disclose.

Elizabeth A Moberg-Wolff, MD Associate Professor, Department of Physical Medicine and Rehabilitation, Children's Hospital of Wisconsin, Medical College of Wisconsin

Elizabeth A Moberg-Wolff, MD is a member of the following medical societies: American Academy for Cerebral Palsy and Developmental Medicine and American Academy of Physical Medicine and Rehabilitation

Disclosure: Medtronic Neurological Grant/research funds Speaking and teaching

Srinivas R Nalamachu, MD Clinical Assistant Professor, Department of Internal Medicine, Kansas City University of Medicine and Biosciences; President and Medical Director, Internation Clinical Research Institute, Inc; Medical Director, Pain Management Institute

Srinivas R Nalamachu, MD is a member of the following medical societies: International Association for the Study of Pain

Disclosure: Nothing to disclose.

Richard Salcido, MD Chairman, Erdman Professor of Rehabilitation, Department of Physical Medicine and Rehabilitation, University of Pennsylvania School of Medicine

Richard Salcido, MD is a member of the following medical societies: American Academy of Pain Medicine, American Academy of Physical Medicine and Rehabilitation, American College of Physician Executives, American Medical Association, and American Paraplegia Society

Disclosure: Nothing to disclose.

Miguel A Schmitz, MD Consulting Surgeon, Department of Orthopedics, Klamath Orthopedic and Sports Medicine Clinic

Miguel A Schmitz, MD is a member of the following medical societies: American Academy of Orthopaedic Surgeons, American Orthopaedic Society for Sports Medicine, Arthroscopy Association of North America, and North American Spine Society

Disclosure: Nothing to disclose.

Alana C Serota, MD Fellow in Metabolic Bone Disease and Osteoporosis, Department of Orthopedics, Hospital for Special Surgery

Alana C Serota, MD is a member of the following medical societies: American Academy of Family Physicians

Disclosure: Nothing to disclose.

Sucharitha Shanmugam, MD Consulting Physician, PMA Medical Specialists, Limerick, PA

Sucharitha Shanmugam, MD is a member of the following medical societies: American College of Rheumatology

Disclosure: Nothing to disclose.

Curtis W Slipman, MD Director, University of Pennsylvania Spine Center; Associate Professor, Department of Physical Medicine and Rehabilitation, University of Pennsylvania Medical Center

Curtis W Slipman, MD is a member of the following medical societies: American Academy of Physical Medicine and Rehabilitation, Association of Academic Physiatrists, International Association for the Study of Pain, and North American Spine Society

Disclosure: Nothing to disclose.

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

Shireesha Vuppalanchi, MD Consulting Staff, Methodist Hospital, Indianapolis; Hospitalist, Respiratory and Critical Care Consultants, PC

Disclosure: Nothing to disclose.

William S Whyte II, MD Director of Interventional Spine and Pain Management, Louisiana Pain Physicians

William S Whyte II, MD is a member of the following medical societies: American Academy of Physical Medicine and Rehabilitation, American Medical Association, Association of Academic Physiatrists, North American Spine Society, Physiatric Association of Spine, Sports and Occupational Rehabilitation, and Southern Medical Association

Disclosure: Nothing to disclose.

Jerome D Wiedel, MD Chair, Professor, Department of Orthopedics, University of Colorado Health Sciences Center

Disclosure: Nothing to disclose.

Authors' Disclaimer

This work does not reflect the views of the Veterans Health Administration or the United States government.

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Osteoporosis. Lateral radiograph demonstrates multiple osteoporotic vertebral compression fractures. Kyphoplasty has been performed at one level.
Osteoporosis. Lateral radiograph of the patient seen in the previous image following kyphoplasty performed at 3 additional levels.
Osteoporosis of the spine. Observe the considerable reduction in overall vertebral bone density and note the lateral wedge fracture of L2.
Osteoporosis of the spine. Note the lateral wedge fracture in L3 and the central burst fracture in L5. The patient had suffered a recent fall.
Normal femoral anatomy.
Stable intertrochanteric fracture of the femur.
Percutaneous vertebroplasty, transpedicular approach.
Asymmetric loss in vertebral body height, without evidence of an acute fracture, can develop in patients with osteoporosis. These patients become progressively kyphotic (as shown) over time, and the characteristic hunched-over posture of severe osteoporosis develops eventually.
In kyphoplasty, a KyphX inflatable bone tamp is percutaneously advanced into the collapsed vertebral body (A). It is then inflated, (B) elevating the depressed endplate, creating a central cavity, and compacting the remaining trabeculae to the periphery. Once the balloon tamp is deflated and withdrawn, the cavity (C) is filled under low pressure with a viscous preparation of methylmethacrylate (D).
Osteoporosis is defined as a loss of bone mass below the threshold of fracture. This slide (methylmethacrylate embedded and stained with Masson's trichrome) demonstrates the loss of connected trabecular bone.
The bone loss of osteoporosis can be severe enough to create separate bone "buttons" with no connection to the surrounding bone. This easily leads to insufficiency fractures.
Inactive osteoporosis is the most common form and manifests itself without active osteoid formation.
Osteoporosis that is active contains osteoid seams (red here in the Masson's trichrome).
Woven bone arising directly from surrounding mesenchymal tissue.
This image depicts bone remodeling with osteoclasts resorbing one side of a bony trabecula and osteoblasts depositing new bone on the other side.
Osteoclast, with bone below it. This image shows typical distinguishing characteristics of an osteoclast: a large cell with multiple nuclei and a "foamy" cytosol.
In this image, several osteoblasts display a prominent Golgi apparatus and are actively synthesizing osteoid. Two osteocytes can also be seen.
Severe osteoporosis. This radiograph shows multiple vertebral crush fractures. Source: Government of Western Australia Department of Health.
Lateral spine radiograph depicting osteoporotic wedge fractures of L1-L2. Source: Wikimedia Commons.
Dual-energy computed tomography (CT) scan in a patient with involutional osteoporosis. Insufficiency fractures of the sacrum and the pubic rami are seen on an isotopic bone scan as a characteristic H, or Honda, sign (arrows), which appears as intense radiopharmaceutical uptake at the fracture sites.
Schematic example of an early bone densitometer: the QDR-1000 System (spine scan). (From: Third National Health and Nutrition Examination Survey Bone Densitometry Manual. Rockville, Md: Westat, Inc; 1989 [revised].)
Bone density scanner. This machine measures bone density to check for osteoporosis in the elderly and other vulnerable subjects. Source: Wikimedia Commons.
Example of a dual energy x-ray absorption (DXA) scan. This image is of the left hip bone. Source: Government of Western Australia Department of Health.
Example of a dual energy x-ray absorption (DXA) scan. This image is of the lumbar spine. Source: Government of Western Australia Department of Health.
Table 1. WHO Definition of Osteoporosis Based on BMD Measurements by DXA
Definition Bone Mass Density Measurement T-Score
Normal BMD within 1 SD of the mean bone density for young adult women T-score ≥ –1
Low bone mass (osteopenia) BMD 1–2.5 SD below the mean for young-adult women T-score between –1 and –2.5
Osteoporosis BMD ≥2.5 SD below the normal mean for young-adult women T-score ≤ –2.5
Severe or “established” osteoporosis BMD ≥2.5 SD below the normal mean for young-adult women in a patient who has already experienced ≥1 fractures T-score ≤ –2.5 (with fragility fracture[s])
Sources:



(1) World Health Organization (WHO). WHO scientific group on the assessment of osteoporosis at primary health care level: summary meeting report. Available at: http://www.who.int/chp/topics/Osteoporosis.pdf. Accessed February 23, 2015.[16]



(2) Kanis JA. Assessment of fracture risk and its application to screening for postmenopausal osteoporosis: synopsis of a WHO report. WHO Study Group. Osteoporos Int. Nov 1994;4(6):368-81.[8]



(3) Czerwinski E, Badurski JE, Marcinowska-Suchowierska E, Osieleniec J. Current understanding of osteoporosis according to the position of the World Health Organization (WHO) and International Osteoporosis Foundation. Ortop Traumatol Rehabil. Jul-Aug 2007;9(4):337-56.[7]



BMD = bone mass density; DXA = dual x-ray absorptiometry; SD = standard deviation; T-score = a measurement expressed in SD units from a given mean that is equal to a patient's BMD measured by DXA minus the value in a young healthy person, divided by the SD measurement in the population.[17]



Table 2. Types of Primary Osteoporosis
Type of Primary Osteoporosis Characteristics
Juvenile osteoporosis
  • Usually occurs in children or young adults of both sexes
  • Normal gonadal function
  • Age of onset: usually 8-14 years
  • Hallmark characteristic: abrupt bone pain and/or a fracture following trauma
Idiopathic osteoporosis
  • Postmenopausal osteoporosis (type I osteoporosis)
  • Occurs in women with estrogen deficiency
  • Characterized by a phase of accelerated bone loss, primarily from trabecular bone
  • Fractures of the distal forearm and vertebral bodies common
  • Age-associated or senile osteoporosis (type II osteoporosis)
  • Occurs in women and men as BMD gradually declines with aging
  • Represents bone loss associated with aging
  • Fractures occur in cortical and trabecular bone
  • Wrist, vertebral, and hip fractures often seen in patients with type II osteoporosis
Table 3. Causes of Secondary Osteoporosis in Adults
Cause Examples
Genetic/congenital
  • Renal hypercalciuria – one of the most important secondary causes of osteoporosis; can be treated with thiazide diuretics
  • Cystic fibrosis
  • Ehlers-Danlos syndrome
  • Glycogen storage disease
  • Gaucher disease
  • Marfan syndrome
  • Menkes steely hair syndrome
  • Riley-Day syndrome
  • Osteogenesis imperfecta
  • Hemochromatosis
  • Homocystinuria
  • Hypophosphatasia
  • Idiopathic hypercalciuria
  • Porphyria
  • Hypogonadal states
Hypogonadal states
  • Androgen insensitivity
  • Anorexia nervosa/bulimia nervosa
  • Female athlete triad
  • Hyperprolactinemia
  • Panhypopituitarism
  • Premature menopause
  • Turner syndrome
  • Klinefelter syndrome
Endocrine disorders[47]
  • Cushing syndrome
  • Diabetes mellitus
  • Acromegaly
  • Adrenal insufficiency
  • Estrogen deficiency
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypogonadism
  • Pregnancy
  • Prolactinoma
Deficiency states
  • Calcium deficiency
  • Magnesium deficiency
  • Protein deficiency
  • Vitamin D deficiency [47, 48]
  • Bariatric surgery
  • Celiac disease
  • Gastrectomy
  • Malabsorption
  • Malnutrition
  • Parenteral nutrition
  • Primary biliary cirrhosis
Inflammatory diseases
  • Inflammatory bowel disease
  • Ankylosing spondylitis
  • Rheumatoid arthritis
  • Systemic lupus erythematosus
Hematologic and neoplastic disorders
  • Hemochromatosis
  • Hemophilia
  • Leukemia
  • Lymphoma
  • Multiple myeloma
  • Sickle cell anemia
  • Systemic mastocytosis
  • Thalassemia
  • Metastatic disease
Medications
  • Anticonvulsants
  • Antipsychotic drugs
  • Antiretroviral drugs
  • Aromatase inhibitors
  • Chemotherapeutic/transplant drugs: cyclosporine, tacrolimus, platinum compounds, cyclophosphamide, ifosfamide, high-dose methotrexate [49]
  • Furosemide
  • Glucocorticoids and corticotropin [50] : prednisone (≥5 mg/day for ≥3 mo) [51]
  • Heparin (long term)
  • Hormonal/endocrine therapies: gonadotropin-releasing hormone (GnRH) agonists, luteinizing hormone-releasing hormone (LHRH) analogues, depomedroxyprogesterone, excessive thyroxine
  • Lithium
  • Selective serotonin reuptake inhibitors (SSRIs)
Miscellaneous
  • Alcoholism
  • Amyloidosis
  • Chronic metabolic acidosis
  • Congestive heart failure
  • Depression
  • Emphysema
  • Chronic or end-stage renal disease
  • Chronic liver disease
  • HIV/AIDS
  • Idiopathic scoliosis
  • Immobility
  • Multiple sclerosis
  • Ochronosis
  • Organ transplantation
  • Pregnancy/lactation
  • Sarcoidosis
  • Weightlessness [52]
Sources:



(1) American Association of Clinical Endocrinologists medical guidelines for clinical practice for the prevention and treatment of postmenopausal osteoporosis: 2001 edition, with selected updates for 2003. Endocr Pract. Nov-Dec 2003;9(6):544-64.[44]



(2) Kelman A, Lane NE. The management of secondary osteoporosis. Best Pract Res Clin Rheumatol. Dec 2005;19(6):1021-37.[45]



Table 4. Prevalence of Osteoporosis Among Racial and Ethnic Groups
Race/Ethnicity Sex (age ≥50 y) % Estimated to have osteoporosis % Estimated to have low bone mass
Non-Hispanic white; Asian Women 15.8 52.6
Men 3.9 36
Non-Hispanic black Women 7.7 36.2
Men 1.3 21.3
Hispanic Women 20.4 47.8
Men 5.9 38.3
Source:  Wright NC, Looker AC, Saag KG, Curtis JR, Delzell ES, Randall S, et al. The recent prevalence of osteoporosis and low bone mass in the United States based on bone mineral density at the femoral neck or lumbar spine. J Bone Miner Res. Nov 2014;29(11):2520-6. [Medline].
Table 5. Baseline Studies for Baseline Conditions in Osteoporosis
Baseline test Disorder
Complete blood count (CBC) CBC results may reveal anemia, as in sickle cell disease (patients with anemia, particularly those older than 60 years, should also be evaluated for multiple myeloma), and may raise the suspicion for alcohol abuse (in conjunction with results from serum chemistry tests and liver function tests)
Serum chemistry levels Calcium levels can reflect underlying disease states (eg, severe hypercalcemia may reflect underlying malignancy or hyperparathyroidism; hypocalcemia can contribute to osteoporosis)



levels of serum calcium, phosphate, and alkaline phosphatase are usually normal in persons with primary osteoporosis, although alkaline phosphatase levels may be elevated for several months after a fracture



levels of serum calcium, phosphate, alkaline phosphatase, and 25(OH) vitamin D may be obtained to assess osteomalacia



Creatinine levels may decrease with increasing parathyroid hormone (PTH) levels or may be elevated in patients with multiple myeloma



Creatinine levels are also used to estimate creatinine clearance, which may indicate reduced renal function in elderly patients



Magnesium is very important in calcium homeostasis[98] ; decreased levels of magnesium may affect calcium absorption and metabolism



Liver function tests Increased levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), bilirubin, and alkaline phosphatase may indicate alcohol abuse
Thyroid-stimulating hormone (TSH) level Thyroid dysfunction has been associated with osteoporosis and should therefore be ruled out[99]
25-Hydroxyvitamin D level This test assesses for vitamin D insufficiency; inadequate vitamin D levels can predispose persons to osteoporosis
Table 6. Tests for Secondary Causes of Osteoporosis
Tests for Secondary Causes of Osteoporosis Disorder
24-Hour urine calcium level This study assesses for hypercalciuria and hypocalciuria
Parathyroid hormone (PTH) level An intact PTH result is essential in ruling out hyperparathyroidism; an elevated PTH level may be present in benign familial hypocalciuric hypercalcemia
Thyrotropin level (if on thyroid replacement) Experts are divided on whether to include thyrotropin testing, regardless of a history of thyroid disease or replacement; however, one study showed reduced femoral neck bone mineral density (BMD) in women with subclinical hypothyroidism and hyperthyroidism[99]
Testosterone and gonadotropin levels in younger men with low bone densities These tests may help evaluate a sex hormone deficiency as a secondary cause of osteoporosis
Urinary free cortisol level and tests for adrenal hypersecretion These tests are used to exclude Cushing syndrome, which, although uncommon, can lead to rapidly progressive osteoporosis when the condition is present; a urine free cortisol value or overnight dexamethasone suppression test should be ordered in suspected cases
Serum protein electrophoresis (SPEP) and urine protein electrophoresis (UPEP) These are used to identify multiple myeloma
Antigliadin and antiendomysial antibodies These tests can help identify celiac disease
Serum tryptase and urine N-methylhistamine These tests help identify mastocytosis
Bone marrow biopsy This study is obtained when a hematologic disorder is suspected
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