Cerebellar atrophy is often symptomatic of other causes, not just atrophy, generally can live a few years to see according to the original cause, as follows: 1, degenerative disease, multi-system atrophy, patients may only live 1-2 years; 2, olivopontocerebellar atrophy, patients can only live 2-3 years; 3, cerebellar ataxia or hereditary cerebellar atrophy, can be long-term survival. Because microcephaly often combines some symptoms such as swallowing disorder and unstable walking, it is easy to fall, which affects life expectancy, such as pneumonia, which may cause life-threatening infectious shock, as well as infection after falling and fracturing in bed, which affects life expectancy. Therefore, it is not possible to generalize the number of years that microcephaly can live, but to judge the causes and complications.