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Difficulty: MediumNeurosurgery

Emergency medical services bring a 6868-year-old male to the trauma bay due to the abrupt onset of occipital head pain and intractable vomiting. The patient's wife notes he was previously healthy except for a long-standing history of medication nonadherence for hypertension. In the triage area, his blood pressure is 215/115215/115 mm Hg with a heart rate of 5454/min. While being evaluated, his level of consciousness rapidly declines; he only opens his eyes to painful stimuli and mumbles incomprehensibly. Neurological assessment demonstrates pronounced left dysmetria and gaze-evoked nystagmus. A stat noncontrast head CT demonstrates a 4.54.5-cm hyperdense collection in the left cerebellar hemisphere, accompanied by compression of the fourth ventricle and dilatation of the supratentorial ventricular system. Based on these findings, which of the following is the most appropriate next step in management?

  1. A
    Intravenous labetalol infusion and clinical observation
  2. B
    Placement of an external ventricular drain alone
  3. C
    Lumbar puncture with controlled cerebrospinal fluid release
  4. Emergent suboccipital craniectomyAnswer
  5. E
    Intravenous administration of hypertonic saline as definitive management

Answer

Emergent suboccipital craniectomy
This patient presents with a large (4.54.5 cm) acute cerebellar hemorrhage, progressive neurologic deterioration, and radiologic evidence of fourth ventricle compression with resulting hydrocephalus. The posterior fossa is a rigid, tightly enclosed space, meaning that expanding masses will quickly exert direct pressure on the brainstem (pons and medulla) and obstruct cerebrospinal fluid outflow. The definitive and life-saving treatment is emergent suboccipital craniectomy with hematoma evacuation. Medical management alone is insufficient and will likely result in fatal brainstem compression or herniation.

Step-by-Step Solution

1
Analyze the clinical presentation and imaging findings.
The patient has an acute cerebellar hemorrhage measuring 4.54.5 cm, complicated by neurologic deterioration, fourth ventricle compression, and obstructive hydrocephalus.
Identifying the size of the hemorrhage and its secondary effects on the brainstem and ventricular system is critical for triage.
2
Determine the treatment criteria for cerebellar hemorrhage.
Guidelines mandate surgical evacuation for cerebellar hemorrhages >3>3 cm, or those presenting with brainstem compression, hydrocephalus, or clinical deterioration.
Posterior fossa space is limited, and expanding masses rapidly cause fatal brainstem compression.
3
Select the appropriate definitive intervention.
Emergent suboccipital craniectomy must be performed to evacuate the hematoma and decompress the posterior fossa.
This is the only measure that definitively relieves the mechanical pressure on the brainstem.

Key Concept

Cerebellar hemorrhages larger than 33 cm, or those associated with neurologic deterioration, brainstem compression, or hydrocephalus, require emergent surgical evacuation via suboccipital craniectomy.
Estimated Time:1m 15s
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Topics

Neurosurgery

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