The majority of medulloblastomas arise from the __________.

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The majority of medulloblastomas arise from the floor of the fourth ventricle, which is the region located in the posterior fossa of the brain. This area contains specialized cells called the cerebellar vermis, which are responsible for maintaining balance and coordinating movements. Medulloblastomas are highly malignant tumors that can cause a variety of symptoms, including headaches, vomiting, and problems with coordination and balance. Treatment typically involves surgical resection of the tumor followed by radiation therapy and chemotherapy.

The Majority of Medulloblastomas Arise from the __________