Management of Malignant Cerebellar Infarct

Immediate Recognition and Triage

Patients with malignant cerebellar infarction require immediate admission to an intensive care or stroke unit with early neurosurgical consultation, and should undergo suboccipital decompressive craniectomy with dural expansion if neurological deterioration occurs from brainstem compression or obstructive hydrocephalus 1, 2
All patients with cerebellar infarction, even if initially stable, must be admitted to an intensive care or stroke unit for close monitoring for up to 5 days 1, 2
The term "malignant" refers to large territorial infarcts that swell within 24 hours causing brain herniation signs, and rapid deterioration from cerebellar infarcts with swelling may be associated with sudden apnea from brainstem compression and cardiac arrhythmias 3

Depression in consciousness level or Glasgow Coma Scale score <12 on admission, or decline of ≥2 points 1, 2
Brainstem compression signs: pupillary anisocoria, pinpoint pupils, loss of oculocephalic responses, bradycardia, irregular breathing patterns, and sudden apnea 1, 2
Radiographic deterioration: fourth ventricular compression and evidence of hydrocephalus on imaging 1, 2

Obtain neurosurgical consultation immediately upon diagnosis, not after deterioration begins 1, 2
This early involvement is essential for optimal outcomes and allows for rapid surgical intervention when needed 2

Elevate the head of bed between 0° and 30° to help manage intracranial pressure 1, 2
Ensure sufficient cerebral oxygenation and correct hypovolemia with isotonic fluids 1, 2
Avoid oral intake of food and fluids initially 1, 2
Treat hyperthermia aggressively and maintain normoglycemia (glucose <8 mmol/L) 1, 2
Initiate thromboembolic prophylaxis with subcutaneous low-dose heparin, low molecular weight heparin, or heparinoids 1, 2

Osmotic therapy with mannitol or hypertonic saline is reasonable for patients with clinical deterioration from cerebral swelling 1

Do not use hypothermia, barbiturates, or corticosteroids for ischemic cerebellar swelling, as they lack sufficient evidence 1, 2

If the patient develops symptoms of obstructive hydrocephalus, emergency ventriculostomy is a reasonable first step, but must be accompanied by decompressive suboccipital craniectomy to avoid upward cerebellar displacement and herniation 1, 2
In patients with cerebellar stroke who deteriorate neurologically despite maximal medical therapy, perform suboccipital craniectomy with dural expansion 1, 2
Do not delay surgical intervention once deterioration begins 1, 2

Inform family members that outcome after cerebellar infarct can be good after suboccipital craniectomy, with surgery leading to acceptable functional outcomes in most patients 1, 2

Do not perform ventriculostomy alone without planning for decompressive craniectomy—this can lead to upward herniation 2
Do not delay neurosurgical consultation until deterioration occurs—early involvement is essential 1, 2
Do not use intravenous heparin due to risk of hemorrhagic transformation, but subcutaneous heparin or low molecular weight heparin is necessary for DVT prophylaxis 4
Do not underestimate the risk of sudden deterioration even in initially stable patients—territorial cerebellar infarctions require monitoring for up to 5 days 1

Discontinue mannitol if renal, cardiac, or pulmonary status worsens, or CNS toxicity develops 3