Multi-focal gliosarcoma: a case report and review of the literature.

Gliosarcoma (GS) is an uncommon malignant brain tumor with biphasic tissue pattern consisted of both glial and sarcomatous components. It usually occurs in adult population of middle age. We report a rare case of multi-focal GS that was initially interpreted as metastases of extra-cranial tumor. The histological examination revealed the biphasic pattern of a GS. The patient was treated with postoperative external radiation therapy and had poor prognosis. To our knowledge this is the second published case of GS with multi-focal presentation. In this study we also review the literature on clinicopathological aspects of GS.