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Difficulty: HardHematology and Oncology

A 64-year-old man with a history of metastatic prostate cancer presents to the emergency department with severe, progressively worsening mid-back pain for the past 2 weeks. Today, he developed bilateral leg weakness and urinary incontinence. Temperature is 37.1°C (98.8°F), blood pressure is 145/90 mmHg, pulse is 92/min, and respiratory rate is 16/min. Physical examination reveals 3/5 motor strength in both lower extremities, decreased pinprick sensation below the T10 dermatome, and hyperreflexia at the knees. Anal sphincter tone is decreased. Laboratory results show a hemoglobin of 11.2 g/dL, leukocyte count of 7,500/μL, platelet count of 210,000/μL, serum creatinine of 1.1 mg/dL, and serum calcium of 9.8 mg/dL. Suspecting a neurologic emergency, arrange the following management steps in the most appropriate chronological order from first to last to optimize his neurologic outcome.

  1. 1Administer high-dose intravenous dexamethasone
  2. 2Obtain an emergent MRI of the entire spine
  3. 3Consult radiation oncology and neurosurgery
  4. 4Initiate definitive decompressive surgery or external beam radiation therapy

Answer

The correct chronological order is: 1) Administer high-dose intravenous dexamethasone, 2) Obtain an emergent MRI of the entire spine, 3) Consult radiation oncology and neurosurgery, 4) Initiate definitive decompressive surgery or external beam radiation therapy.
The correct sequence ensures that the spinal cord is immediately protected from irreversible ischemic damage using medical therapy (dexamethasone) before taking the time to confirm the anatomical diagnosis with imaging (MRI). Once the exact anatomy is known, specialist consultation dictates the ultimate definitive therapy.

Step-by-Step Solution

1
Recognize the oncologic emergency
Diagnosis of suspected malignant epidural spinal cord compression (ESCC)
The patient with a known cancer history presents with hallmark features: back pain, motor weakness, a sensory level, and bowel/bladder dysfunction.
2
Determine the most critical immediate medical intervention
Administer high-dose intravenous dexamethasone
Corticosteroids reduce peritumoral vasogenic edema, protecting the spinal cord from irreversible ischemic injury. This must precede diagnostic imaging to preserve neurologic function.
3
Select the appropriate definitive diagnostic test
Obtain an emergent MRI of the entire spine
MRI is the imaging modality of choice to visualize the spinal cord and identify the precise level and extent of compression, as well as any multiple synchronous lesions.
4
Plan for definitive structural management
Consult specialists followed by definitive therapy
Surgical decompression or radiation therapy requires multidisciplinary input based on tumor histology, spinal stability, and overall prognosis.

Key Concept

In patients with suspected malignant epidural spinal cord compression (ESCC) and acute neurologic deficits, immediate administration of high-dose corticosteroids is the first and most critical step, which must precede confirmatory diagnostic imaging.
Estimated Time:1m 30s
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Topics

Hematology and Oncology

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