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Difficulty: MediumNeurosurgery

A male patient, aged 45, presents to the emergency room with a 7-day history of escalating mid-thoracic back pain and subjective fevers. He has a known medical history of intravenous substance use disorder. Over the last 24 hours, he noted rapidly progressive weakness in both legs and an inability to void urine. Vital signs show a temperature of 38.9°C (102°F), heart rate of 110/min, and blood pressure of 122/78 mm Hg. Neurologic examination reveals 2/5 motor strength in the bilateral lower extremities, a distinct loss of pain and temperature sensation below the umbilicus, and 3+ patellar reflexes with bilateral Babinski signs. Bladder ultrasound reveals a post-void residual volume of 650 mL. Empiric intravenous vancomycin and ceftriaxone are promptly initiated. Magnetic resonance imaging of the spine demonstrates a peripherally enhancing anterior epidural collection spanning T9-T11, causing severe compression of the spinal cord. Which of the following is the most appropriate next step in management?

  1. A
    Continuation of current intravenous antibiotics with close neurologic monitoring
  2. B
    High-dose intravenous methylprednisolone administration
  3. C
    CT-guided percutaneous needle aspiration of the fluid collection
  4. Urgent surgical laminectomy and debridementAnswer
  5. E
    Lumbar puncture for cerebrospinal fluid culture and analysis

Answer

Urgent surgical laminectomy and debridement
The patient presents with the classic triad of a spinal epidural abscess (SEA): fever, localized back pain, and neurologic deficits. The diagnosis is confirmed by the MRI showing an enhancing anterior epidural collection causing severe spinal cord compression. The neurologic findings, including paraparesis, a sensory level at T10, and bladder dysfunction, indicate acute compromise of the spinal cord. While empiric broad-spectrum antibiotics are initiated immediately, isolated medical therapy is inadequate once neurologic deficits manifest. The definitive treatment for an SEA with active cord compression is emergent surgical decompression (typically via laminectomy) and purulent debridement. Prompt surgical intervention is critical to relieve mechanical pressure and prevent permanent paralysis.

Step-by-Step Solution

1
Identify the clinical syndrome from the patient's presentation.
The patient has the classic triad of a spinal epidural abscess: fever, severe back pain, and neurologic deficits.
Recognizing the syndrome establishes the need for immediate intervention.
2
Localize the neurologic lesion based on physical examination findings.
A sensory level at the umbilicus (T10), bilateral lower extremity weakness, hyperreflexia, and urinary retention indicate an upper motor neuron lesion in the thoracic spinal cord.
Localization correlates with the subsequent imaging findings to confirm the cause of the deficits.
3
Interpret the imaging results provided in the stem.
The MRI confirms a compressive thoracic epidural abscess causing severe central canal stenosis.
Imaging differentiates an epidural abscess from other causes of myelopathy, such as transverse myelitis or malignancy.
4
Determine the therapeutic indication based on the neurologic status.
Because the patient has acute, progressive neurologic deficits (paraparesis and bowel/bladder dysfunction), conservative medical management is insufficient.
Mechanical compression must be relieved immediately to salvage spinal cord function and prevent permanent paralysis.
5
Select the definitive intervention.
Emergent surgical laminectomy and debridement is selected as the next best step.
Open surgical decompression directly relieves the pressure on the spinal cord and allows for source control of the infection.

Key Concept

Management of a spinal epidural abscess complicated by neurologic deficits requires emergent surgical decompression via laminectomy in addition to broad-spectrum antibiotics.
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Topics

Neurosurgery

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