label: Pilomyxoid Astrocytoma
label_lc: pilomyxoid astrocytoma
description: "An astrocytic tumor of uncertain relation to pilocytic astrocytoma.  It occurs predominantly in infants and young children.  It is characterized by a monomorphic architectural pattern, usually associated with the absence of Rosenthal fibers and eosinophilic granular bodies.  The clinical course is usually aggressive."