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Slowly evolving cerebellar haematomas are often associated with warfarin therapy or hypertension. The dentate nucleus is most frequently affected, and less frequently, the vermis.
Characteristically, the patient is no longer able to walk in a straight line, has an occipital headache, and may present in a state of unconsciousness. There is often dysarthria, nystagmus, dizziness and vomiting.
Ocular signs such as a paralysis of conjugate gaze, a VI nerve palsy, and 'skew deviation' are sometimes seen.
A differential in children with such signs is a small cerebellar angioma.