A fast growing type of brain tumor that occurs in or around the pineal gland, a tiny organ near the center of the brain.
A type of brain tumour. ... (12 Dec 1998) ... 
Type: Term Pronunciation: pin′ē-ō-blas-tō′mă Definitions: 1. A poorly differentiated tumor of the pineal gland most frequently occurring in the first 3 decades of life consisting of small cells with a scant amount of cytoplasm and often forming pseudorosettes; histologically resembles a medulloblastoma; a type of pri...
Pineoblastoma: A fast-growing brain tumor in the pineal gland that originates in germ cells. Also known as a pineal teratoma.