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Zorluk: Çok zorNeurosurgery

A 42-year-old man is brought to the emergency department by emergency medical services after his roommates found him unable to walk. The patient states he has had severe, constant mid-back pain for the past two weeks, which became excruciating over the last 48 hours. Today, he developed profound weakness in both legs and has not been able to urinate since yesterday morning. His past medical history is significant for intravenous heroin use and a recent hospitalization for a cutaneous abscess that he left against medical advice. His temperature is 38.6∘C38.6^\circ\text{C} (101.5∘F101.5^\circ\text{F}), blood pressure is 110/70 mm Hg110/70\text{ mm Hg}, and heart rate is 112/min112/\text{min}. Neurologic examination reveals 1/51/5 strength in the bilateral lower extremities, absent patellar and Achilles reflexes, and decreased sensation to all modalities below the umbilicus. Digital rectal examination shows decreased anal sphincter tone. A bladder scan reveals 800 mL800\text{ mL} of retained urine. Which of the following is the most appropriate immediate next step in the diagnostic or therapeutic management of this patient?

  1. A
    Immediate administration of high-dose intravenous dexamethasone
  2. B
    Emergent exploratory decompressive laminectomy
  3. C
    Empiric intravenous antibiotics and serial neurologic examinations
  4. Emergent magnetic resonance imaging of the spineCevap
  5. E
    Lumbar puncture for cerebrospinal fluid analysis

Cevap

The most appropriate immediate next step is emergent magnetic resonance imaging of the spine.
This patient presents with the classic triad for a spinal epidural abscess (SEA): fever, localized back pain, and neurologic deficits. His history of intravenous drug use is a major risk factor. The acute onset of paraparesis and urinary retention indicates severe spinal cord and cauda equina compression. In any patient with suspected SEA and neurologic compromise, the immediate next step is emergent magnetic resonance imaging (MRI) of the spine with gadolinium. MRI is essential to confirm the diagnosis, determine the extent of the abscess (which often spans multiple vertebral levels), and guide urgent surgical decompression. While blood cultures should be drawn and broad-spectrum intravenous antibiotics initiated rapidly, this medical management does not preclude the absolute necessity of emergent imaging before surgery.

Adım Adım Çözüm

1
Identify the clinical syndrome
The patient presents with fever, severe back pain, and acute lower extremity neurologic deficits (paraparesis, sensory loss, urinary retention).
Recognizing the classic triad of a spinal epidural abscess is essential for directing management.
2
Identify risk factors and determine the etiology
The patient's history of intravenous heroin use and a recent cutaneous abscess strongly point toward an infectious etiology (e.g., Staphylococcus aureus) rather than a neoplastic process.
Differentiating infectious from malignant cord compression changes the immediate medical management, as steroids are contraindicated in infections.
3
Determine the optimal diagnostic and therapeutic sequence
Before definitive surgical decompression can be performed safely, the exact anatomical level and extent of the abscess must be visualized.
Emergent MRI of the spine with gadolinium is the gold standard diagnostic test and is strictly required to guide the neurosurgical approach.

Anahtar Kavram

Management of spinal epidural abscess and the contraindication of corticosteroids in infectious cord compression
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Neurosurgery

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