This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
What diameter of cerebellar hematoma will require surgical evacuation 
Select and explain. 
A. > 0.5 cm, B. > 1 cm, C. > 2 cm, D. > 3 cm
D: > 3 cm
Answer: D: > 3 cm 
Explanation: Most cerebellar hematomas >3 cm in diameter will require surgical evacuation. If the patient is ale without focal brainstem signs and if the hematoma is <1 cm in diameter, surgical removal is usually unnecessary. Patients with hematomas between 1 and 3 cm require careful observation for signs of impaired consciousness, progressive hydrocephalus, and precipitous respiratory failure.Reference: Harrison 19th edition 2585