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Difficulty: HardNeurosurgery

A 6262-year-old man with a history of poorly controlled hypertension is brought to the emergency department after suddenly developing a severe occipital headache, intractable vomiting, and an inability to walk. On presentation, his blood pressure is 210/110210/110 mm Hg, heart rate is 5858/min, and respiratory rate is 1414/min. His Glasgow Coma Scale (GCS) score is 1414. Neurologic examination shows marked left-sided dysmetria on finger-to-nose testing, horizontal nystagmus, and truncal ataxia. There is no limb weakness. Noncontrast CT of the head reveals a 4.24.2-cm hyperdense acute hemorrhage in the left cerebellar hemisphere with complete effacement of the fourth ventricle. While in the emergency department, his level of consciousness rapidly declines, and his GCS score drops to 77 (E2, V1, M4). The patient is immediately intubated for airway protection. Which of the following is the most appropriate next step in management?

  1. A
    Immediate CT angiography of the head and neck
  2. B
    Continuous intravenous labetalol infusion
  3. Emergent suboccipital craniotomyAnswer
  4. D
    Placement of an external ventricular drain
  5. E
    Hyperventilation to a target PaCO2 of 25 mm Hg

Answer

Emergent suboccipital craniotomy
This patient presents with an acute cerebellar hemorrhage complicated by rapid neurologic deterioration and brainstem compression (evidenced by the effaced fourth ventricle, bradycardia, and declining level of consciousness). The posterior fossa is a small, rigid compartment, meaning expanding lesions here quickly compress the brainstem and cause tonsillar herniation. The definitive, life-saving management for a cerebellar hemorrhage greater than 33 cm in diameter with signs of brainstem compression is emergent surgical decompression via suboccipital craniotomy. This procedure directly evacuates the hematoma and relieves the life-threatening pressure on the pons and medulla.

Step-by-Step Solution

1
Analyze the clinical and radiographic findings
The patient has a 4.24.2-cm cerebellar hemorrhage with 4th ventricle effacement and rapid neurologic deterioration (GCS dropped to 77).
Identifying the size and location of the bleed, along with the patient's trajectory, dictates the urgency and modality of treatment.
2
Determine the surgical indications for cerebellar hemorrhage
Surgical decompression is indicated because the hemorrhage is >3>3 cm, causes brainstem compression (effaced 4th ventricle), and is accompanied by clinical deterioration.
Unlike basal ganglia or small lobar hemorrhages, the posterior fossa is a tight space where expanding mass effect quickly leads to fatal brainstem compression.
3
Select the most definitive next step
Following immediate airway protection, emergent surgical evacuation via suboccipital craniotomy is required.
Medical management or CSF diversion alone will not resolve the direct mechanical compression on the brainstem.

Key Concept

Cerebellar hemorrhages greater than 33 cm in diameter, or those causing neurologic deterioration, brainstem compression, or hydrocephalus, require emergent surgical decompression (craniotomy).
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Topics

Neurosurgery

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