Atypical Teratoid Rhabdoid Tumor, ventral surface of brain.

Last updated on Thursday, April 2 2009 by gliageek

Atypical Teratoid Rhabdoid Tumor, ventral surface of brain.

A fungating mass can be seen extruding from the left cerebellar hemisphere. In this patient, tumor was present throughout the ventricular system of the brainstem, and extended out through the foramina into the subarachnoid space. In addition, the tumor extended throughout the cerebellar hemisphere and directly into the subarachnoid space.

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Atypical Teratoid Rhabdoid Tumor Ventral with arrow
This is a gross brain specimen. We are viewing the ventral aspect. Normal cerebellum is visible on your right. The unnecessarily large green arrow on your left points to the Atypical Teratoid/Rhabdoid Tumor (ATRT). Although they may arise elsewhere, ATRTs most frequently arise in the posterior fossa.