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Difficulty: HardNeurosurgery

A 64-year-old man is transported to the emergency department by ambulance following a sudden collapse at his residence. His spouse notes that prior to collapsing, he described an explosive pain in the back of his head, followed by severe vertigo, intractable emesis, and an inability to stand. His past medical history is significant for long-standing hypertension and medication nonadherence. On presentation, his blood pressure is 210/115 mm Hg, heart rate is 88/min, and respiratory rate is 16/min. He is immediately started on a continuous intravenous nicardipine infusion. Neurologic examination reveals a lethargic patient who arouses only to loud voice. He exhibits prominent left-sided finger-to-nose ataxia and horizontal nystagmus. A noncontrast CT scan of the head demonstrates a 4.2-cm hyperdense collection in the left cerebellar hemisphere with complete effacement of the fourth ventricle and marked enlargement of the lateral and third ventricles. Which of the following is the most appropriate definitive management for this patient?

  1. Suboccipital craniectomy and hematoma evacuationAnswer
  2. B
    External ventricular drain placement alone
  3. C
    Hyperosmolar therapy with serial neurologic examinations
  4. D
    Controlled cerebrospinal fluid drainage via lumbar puncture
  5. E
    Diagnostic cerebral angiography with endovascular coiling

Answer

Suboccipital craniectomy and hematoma evacuation
The correct answer is suboccipital craniectomy and hematoma evacuation. This patient has a large (4.2 cm) hypertensive cerebellar hemorrhage causing obstructive hydrocephalus and altered mental status. Because the posterior fossa is a small, rigid, and tightly confined space, expanding hematomas can rapidly cause fatal brainstem compression and tonsillar herniation. Neurosurgical guidelines dictate that cerebellar hemorrhages > 3 cm in diameter, or those associated with obstructive hydrocephalus, brainstem compression, or clinical deterioration, require urgent surgical evacuation rather than conservative medical management.

Step-by-Step Solution

1
Identify the primary pathology from the clinical and radiographic findings.
The patient has a hypertensive spontaneous cerebellar intracerebral hemorrhage, indicated by ataxia, vertigo, and a 4.2-cm hyperdense mass on the noncontrast CT scan.
Accurate diagnosis of the hemorrhage location and size is necessary to determine the surgical threshold.
2
Assess for secondary complications of the hemorrhage.
The hematoma is causing severe mass effect, evidenced by fourth ventricle effacement, obstructive hydrocephalus, and a depressed level of consciousness.
The presence of mass effect and hydrocephalus changes the management from medical to surgical.
3
Apply the neurosurgical intervention criteria for cerebellar hemorrhage.
Because the hematoma is > 3 cm and is causing brainstem compression and hydrocephalus, urgent surgical decompression is mandated.
The posterior fossa is a confined space; expanding lesions rapidly cause fatal brainstem compression if not evacuated.

Key Concept

Urgent surgical decompression (craniectomy and hematoma evacuation) is indicated for cerebellar hemorrhages greater than 3 cm in diameter, or those causing brainstem compression, hydrocephalus, or neurological deterioration.
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Topics

Neurosurgery

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