Long-term relapse-free survival with supratentorial primitive neuroectodermal tumor in an adult: a case report.

Objective: In adults, supratentorial primitive neuroectodermal tumor (sPNET) is a very rare undifferentiated embryoblastic neoplasm. Prognosis is worse in comparison to infratentorial medulloblastoma. Older age appears to be prognostically favorable.