An ovoid piece of rubbery to gelatinous tan and dark brown tissue 24x19x17mm.
Paraffin sections show a moderately hypercellular glial tumor. Tumor cells have uniform round and oval nuclei with finely granular chromatin and coarse fibrillary processes. There is discernible perivascular pseudo-rosette formation thoughout the tumor with mucinous/myxoid material within many pesudo-rosettes. Areas with prominent microcyst formation are also present with cysts also filled with mucinous/myxoid material. No mitotic figures are identified. There is no microvascular proliferation. A geographic area of necrosis is noted in specimen 2. The features are of myxopapillary ependymoma (WHO Grade I)