Machado-Joseph disease type 3 is a subtype of Machado-Joseph disease (SCA3/MJD) of milder severity characterized by late onset, slower progression, and peripheral amyotrophy. The disease is MONDO_0017176 (Machado-Joseph disease type 3). Also known as: SCA3, Machado type, azorean disease, type iii, spinocerebellar ataxia type 3, Machado type.