[Pineal Parenchymal Tumors of Intermediate Differentiation are monomorphous tumors characterized by moderately high cellularity, mild nuclear atypia, occasional mitosis, and the absence of large pineocytomatous rosettes. They occur at all ages, from young children to adults, with a peak incidence in adulthood. Clinical behavior is variable. (Adapted from WHO.) ( NCI )]
UMLS (NCI) C1367859