Плеоморфная ксантоастроцитома

A rare low-grade astrocytoma characterized by superficial location in the cerebral hemispheres with involvement of the meninges, composed of GFAP-expressing cells showing nuclear and cytoplasmic pleomorphism and xanthomatous change, surrounded by a reticulin network. The tumor corresponds to WHO grade II and typically affects children and young adults, who often present with a long history of seizures. Extent of resection and mitotic index are important prognostic factors.