Treatment and Outcome

Surgical excision is the treatment of choice. Their location in the cerebellar hemisphere means that most are accesible and usually can be excised totally. Grossly, the tumor tissue is well demarcated from the surrounding cerebellum; this facilitates resection. In some cases, the cyst wall is also composed of tumor cells and must be

excised as well. Gross total resection is associated with a >90% long-term cure rate. Adjunctive therapy is not required, although most patients are followed by serial imaging studies. Occasional recurrence many years after primary tumor resection has been reported.

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