[A WHO grade I large cystic tumor that occurs almost exclusively in infants, with a prominent desmoplastic stroma having a neuroepithelial population of neoplastic astrocytes together with a variable neuronal component. They involve the superficial cerebral cortex and leptomeninges, and often attach to the dura. Although clinically they present as large tumors, they generally have a good prognosis following surgical resection. (Adapted from WHO 2000.) - 2004 ( NCI )]
UMLS (NCI) C1321878DIG