Desmoplastic medulloblastoma metastatic to the pancreas: case report.

A case is reported in which a desmoplastic medulloblastoma metastasized to the pancreas and to the surrounding soft tissues but did not recur locally or disseminate within the central nervous system. Multidrug chemotherapy and local radiation therapy resulted in a complete remission. In all four previously reported cases of medulloblastoma metastasizing to the pancreas, the diagnosis was not made until the postmortem examination, and all of these patients also had extensive metastases in other organ systems. Modification of the Weiss criteria defining extraneural metastases from tumors of the central nervous system is suggested.