Monarch Disease Ontology entry MONDO_0016418 (multiple system atrophy, cerebellar type) (MSA-c) is a form of multiple system atrophy (MSA) with predominant cerebellar features (gait and limb ataxia, oculomotor dysfunction, and dysarthria). Also known as: MSA, cerebellar type, MSA-c, sporadic OPCA type 1, sporadic olivopontocerebellar atrophy type 1.