Obsolete Uses of The Term
In the past, the term "olivopontocerebellar atrophy" extended to both the sporadic (non-hereditary) cases of the disease, which have been currently reclassified as a form of multiple system atrophy, as well as to four hereditary types, which have been currently reclassified as four different forms of spinocerebellar ataxia:
| Hereditary OPCA type | OPCA name | SCA # | Gene | OMIM |
| OPCA type 1 | "Menzel type OPCA" | SCA1 | ATXN1 | 164400 |
| OPCA type 2, autosomal dominant | "Holguin type OPCA" | SCA2 | ATXN2 | 183090 |
| OPCA type 3 | "OPCA with retinal degeneration" | SCA7 | ATXN7 | 164500 |
| OPCA type 4 | "Schut-Haymaker type OPCA" | SCA1 | ATXN1 | 164400 |
Read more about this topic: Olivopontocerebellar Atrophy
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