Pilomyxoid Astrocytoma

**Semantic type:** Neoplastic Process

**Definition:** 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.

**Synonyms:** - Pilomyxoid astrocytoma