Cerebellar form of multiple system atrophy: A case report.

Multiple system atrophy is a form of synucleinopathy with an unknown etiology that causes progressive neurodegeneration. It may affect the cerebellum, autonomic nerves, and pyramidal and extrapyramidal systems. We present the case of a 51-year-old man who was hospitalized for recurrent balance problems and dizziness. Cranial magnetic resonance imaging showed the "hot cross bun" sign of the pons with major atrophy of the cerebellum. The cerebellar form of probable multiple system atrophy was the final diagnosis.