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Difficulty: MediumHematology and Oncology

A 66-year-old retired mechanic is brought to the clinic by his daughter after experiencing difficulty walking over the past 24 hours. He reports a two-week history of dull, continuous pain in his mid-thoracic region that worsens when he lies flat in bed. His past medical history is significant for non-small cell lung cancer treated with radiation and chemotherapy two years ago. On neurologic examination, he demonstrates 3/5 strength in the bilateral lower extremities, diminished sensation to pinprick below the umbilicus, and symmetric hyperreflexia at the patellae and ankles. Rectal examination reveals decreased sphincter tone. Vital signs are within normal limits except for a temperature of 37.8°C (100.0°F). Laboratory results reveal a normal leukocyte count and a serum calcium level of 9.2 mg/dL. Which of the following is the most appropriate initial step in the management of this patient?

  1. A
    Magnetic resonance imaging of the entire spine
  2. B
    Intravenous ceftriaxone and vancomycin
  3. Intravenous dexamethasone administrationAnswer
  4. D
    Intravenous zoledronic acid
  5. E
    Lumbar puncture for cerebrospinal fluid analysis

Answer

Immediate administration of intravenous dexamethasone.
The correct answer is intravenous dexamethasone administration. This patient's presentation of progressively worsening thoracic back pain that is exacerbated by recumbency, accompanied by acute bilateral lower extremity weakness, sensory level deficits, and bowel/bladder dysfunction in the setting of a known solid malignancy, is highly concerning for neoplastic epidural spinal cord compression (ESCC). In cases of suspected ESCC, intravenous glucocorticoids must be given immediately upon clinical suspicion to reduce vasogenic edema, alleviate pressure on the spinal cord, and preserve neurological function. Steroids must be administered prior to obtaining confirmatory imaging.

Step-by-Step Solution

1
Identify the clinical syndrome from the patient's presentation.
The patient exhibits red flag signs for neoplastic epidural spinal cord compression (ESCC): back pain worse with lying down, lower extremity motor weakness, sensory level deficits, and bowel/bladder dysfunction, all in the context of a previous solid organ malignancy.
Recognizing this oncologic emergency early is critical because neurologic recovery is directly tied to the neurologic status at the time treatment is initiated.
2
Determine the priority of management for suspected ESCC.
High-dose glucocorticoids (e.g., dexamethasone) must be administered immediately.
Corticosteroids rapidly decrease peritumoral vasogenic edema, thereby acutely relieving physical pressure on the spinal cord and preventing irreversible ischemia and paralysis.
3
Plan the subsequent sequence of care.
Arrange for an urgent magnetic resonance imaging (MRI) of the entire spine after steroid administration.
While imaging is required to confirm the diagnosis and guide definitive treatment (such as surgical decompression or targeted radiation therapy), diagnostic tests should never delay the initial medical stabilization of the spinal cord.

Key Concept

The initial management of suspected neoplastic epidural spinal cord compression requires the immediate administration of high-dose intravenous glucocorticoids (like dexamethasone) to reduce spinal cord edema and preserve neurologic function, even before confirmatory imaging is obtained.
Estimated Time:1m 0s
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Topics

Hematology and Oncology

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