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Difficulty: MediumNeurosurgery

Paramedics transport a patient to the trauma bay after he experienced a sudden loss of consciousness at his workplace. The patient's coworkers state that he abruptly grabbed the back of his head, complained of severe dizziness and nausea, and then collapsed. Medical records indicate he is 62 years old and has a long-standing history of medication nonadherence for essential hypertension. Currently, his blood pressure is 198/115 mmHg, and his heart rate is 54/min. Neurological assessment shows a profoundly lethargic patient who only localizes to painful stimuli and has irregular respirations. Non-contrast cranial computed tomography (CT) demonstrates a 4.2-cm hyperdense collection in the right cerebellar hemisphere, associated with compression of the fourth ventricle and significant dilation of the lateral ventricles. Which of the following is the most appropriate next step in management?

  1. Emergent suboccipital craniectomy and hematoma evacuationAnswer
  2. B
    Placement of an external ventricular drain and transfer to the intensive care unit
  3. C
    Initiation of an intravenous labetalol infusion for strict blood pressure control
  4. D
    Administration of intravenous dexamethasone and observation
  5. E
    Immediate performance of a lumbar puncture for cerebrospinal fluid analysis

Answer

Emergent suboccipital craniectomy and hematoma evacuation
The correct answer is emergent suboccipital craniectomy and hematoma evacuation. This patient presents with an acute spontaneous cerebellar hemorrhage likely secondary to hypertensive emergency. The size of the hematoma (4.2 cm), combined with the effacement of the fourth ventricle, resulting obstructive hydrocephalus, and clinical signs of brainstem compression (bradycardia, irregular respirations, lethargy), constitutes a neurosurgical emergency. The standard of care for cerebellar hemorrhages greater than 3 cm in diameter, or those associated with brainstem compression or hydrocephalus, is immediate surgical evacuation. This prevents fatal cerebellar tonsillar herniation and directly addresses both the primary mass effect and the secondary hydrocephalus.

Step-by-Step Solution

1
Analyze the patient's clinical presentation.
The patient has sudden onset headache, vertigo, and collapse, with profound lethargy, hypertension, bradycardia, and irregular respirations.
These findings are highly suggestive of increased intracranial pressure and impending brainstem herniation (Cushing's triad).
2
Interpret the neuroimaging findings.
CT shows a 4.2-cm cerebellar hemorrhage with fourth ventricle compression and hydrocephalus.
Cerebellar hematomas larger than 3 cm or those causing neurological deterioration require distinct management compared to smaller or supratentorial bleeds.
3
Determine the next best step in management.
The definitive treatment is emergent surgical decompression via suboccipital craniectomy.
Surgical evacuation relieves the mass effect on the brainstem and resolves the obstructive hydrocephalus, preventing fatal tonsillar herniation.

Key Concept

Surgical management of acute cerebellar hemorrhage
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Topics

Neurosurgery

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