Musculoskeletal · Spine Pathology
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Vertebral compression fractures are most commonly caused by osteoporosis in elderly postmenopausal women, producing anterior wedge collapse from minor axial load.
Acute presentation is well-localized back pain that worsens with weight-bearing and improves supine, with point tenderness over the spinous process.
Initial imaging is plain radiography showing loss of anterior vertebral height (>20%); MRI is the gold standard to determine fracture age (bone marrow edema = acute) and rule out malignancy.
A DEXA scan with a T-score <= -2.5 confirms the underlying osteoporosis.
Chronic disease causes progressive kyphosis, classically a dowager's hump, with loss of height.
First-line treatment is conservative with NSAIDs and early mobilization, plus bisphosphonates (alendronate) for the osteoporosis; avoid prolonged bed rest.
Radiculopathy or myelopathy are red flags for retropulsed bone or malignancy; refractory pain after 4 weeks may warrant vertebroplasty or kyphoplasty.
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A 74-year-old postmenopausal woman presents with sudden severe mid-back pain that began after she bent over to pick up groceries. The pain worsens when she stands and improves when she lies flat. Exam reveals point tenderness over the T12 spinous process with a normal neurologic exam. A lateral spine radiograph shows anterior wedging of the T12 vertebral body with greater than 20% loss of anterior height.
Which of the following is the most appropriate initial treatment?
Analgesia with early mobilization
Acute osteoporotic vertebral compression fractures without neurologic deficit are managed conservatively with analgesia and early mobilization, plus bisphosphonates for the underlying osteoporosis. Prolonged bed rest is avoided because it accelerates bone loss and deconditioning, and surgery is reserved for refractory pain.
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Etiology / Epidemiology
Most commonly caused by osteoporosis in elderly postmenopausal women, or high-energy trauma in younger patients.
Clinical Manifestations
Acute onset of localized back pain worsening with movement and point tenderness, classically leading to progressive kyphosis known as a dowager's hump.
Diagnosis
Initial imaging is plain radiography showing anterior wedging; MRI is the gold standard to differentiate acute vs. chronic fractures and rule out malignancy.
Treatment
First-line is conservative with analgesia and early mobilization; underlying osteoporosis requires bisphosphonates, while prolonged bed rest must be avoided.
Prognosis
High risk of subsequent fractures, chronic pain, and severe kyphosis leading to restrictive lung disease.
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Epidemiology & Etiology
Primarily affects postmenopausal women due to primary osteoporosis. Secondary causes include chronic glucocorticoid use, hyperparathyroidism, and malignancies like multiple myeloma. Occurs in younger patients almost exclusively following high-energy trauma. Spontaneous fractures in young males strongly suggest a pathologic etiology.
Pertinent Anatomy
Involves the vertebral body, most frequently at the thoracolumbar junction (T8-L1). The anterior column collapses while the middle and posterior spinal columns remain intact, which critically distinguishes it from a burst fracture.
Pathophysiology
Decreased bone mineral density leads to microarchitectural deterioration of trabecular bone. Axial loading forces, often from minor trauma like coughing or bending, overcome the weakened anterior vertebral body's compressive strength. This causes anterior wedge-shaped collapse, shifting the center of gravity forward and increasing mechanical stress on adjacent vertebrae.
Clinical Manifestations
Presents as acute, severe, well-localized back pain that worsens with weight-bearing and improves with lying supine. Physical exam reveals point tenderness directly over the affected spinous process. The neurologic exam is typically normal; radiculopathy or myelopathy are red flags indicating retropulsed bone or malignancy. Chronic cases develop progressive kyphosis, classically termed a dowager's hump, accompanied by loss of height.
Diagnosis
The initial test is plain radiography (AP and lateral views) demonstrating a loss of anterior vertebral height (>20%). MRI without contrast is the gold standard to determine fracture age, showing bone marrow edema in acute fractures, and to evaluate for spinal cord compression. A DEXA scan with a T-score ≤ -2.5 is required to confirm the underlying osteoporosis.
Treatment
First-line therapy is conservative management including NSAIDs, acetaminophen, and early mobilization to prevent DVT and deconditioning. Underlying osteoporosis must be treated with bisphosphonates (e.g., alendronate) to prevent recurrence. If pain is severe and refractory to >4 weeks of medical management, percutaneous vertebroplasty or kyphoplasty may be indicated. Avoid prolonged bed rest as it accelerates bone loss.
Prognosis
Patients are at a 5-fold increased risk for subsequent vertebral fractures. Severe kyphosis can alter thoracic anatomy, leading to restrictive lung disease and impaired pulmonary function.
Differential Diagnosis
Spinal stenosis: Pain worsens with extension and improves with flexion, presenting as neurogenic claudication.
Burst fracture: High-energy trauma involving anterior and middle columns with retropulsed fragments causing neurologic deficits.
Multiple myeloma: Presents with systemic symptoms, anemia, hypercalcemia, and punched-out lytic lesions on imaging.
Metastatic bone disease: Insidious onset of pain that is worse at night and unresponsive to rest.