Congenital Mature Intracranial Teratoma in a Pampas Deer ( Ozotoceros bezoarticus ) in Brazil.

We describe a congenital mature intracranial teratoma in a Pampas deer ( Ozotoceros bezoarticus ) in southern Brazil. We found an irregular, spongy, space-occupying mass in the brain. The tumor consisted of well-differentiated tissues that derived from all three germ layers.