Meningeal Central Nervous System Solitary Fibrous Tumor, Grade 3

**Semantic type:** Neoplastic Process

**Definition:** A solitary fibrous tumor that arises from the meninges. It most often corresponds to the tumor previously diagnosed as anaplastic hemangiopericytoma.

**Synonyms:** - Meningeal Anaplastic Hemangiopericytoma - Meningeal Anaplastic Hemangiopericytoma (WHO Grade III) - Meningeal CNS Solitary Fibrous Tumor, Grade 3 - Meningeal Malignant Hemangiopericytoma - Meningeal Solitary Fibrous Tumor/Hemangiopericytoma, Grade 3