NCIt definition : 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. It involves the superficial cerebral
cortex and leptomeninges, and often attaches to the dura. Although clinically it presents
as a large tumor, it generally has a good prognosis following surgical resection.
(Adapted from WHO);
Alternative definition : NICHD: A WHO grade I large cystic tumor that occurs almost exclusively in infants.
It involves the superficial cerebral cortex and leptomeninges, and often attaches
to the dura.;