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As of 2018, multiple system atrophy is not generally considered to be hereditary although there are some extremely rare cases of families with MSA in Japan. It's important to note that there are a few very rare genetic diseases that can mimic MSA symptoms. The most common of these are the Spinocerebellar Ataxias (SCA). A good diagnostic workup should be done by your neurologist to rule out any common genetic diseases that can look like MSA. You can refer your doctor to the MSA diagnostic criteria at this link: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2676993/