Pilocytic astrocytoma

Overview
Pilocytic astrocytoma is a brain tumor that occurs predominantly in children and involves the midline, basal and posterior fossa structures. It is generally considered a benign tumor of childhood. It is often cystic and if solid, it tends to be well circumscribed. It is characteristically a contrast enhancing tumor by current imaging investigations (e.g. CT scan, MRI) Microscopically, the tumor is composed of bipolar cells with long "hairlike" GFAP-positive processes. Rosenthal fibers, eosinophilic granular bodies and microcysts are often present. It is classified as Grade 1 Astrocytoma.

Acknowledgements
Initial content for this page in some instances came from Wikipedia

Pilocytisk astrocytom