Papillary Ependymoma

**Semantic type:** Neoplastic Process

**Definition:** A rare variant of ependymoma characterized by well formed papillae. Tumor cell processes abutting capillaries are usually GFAP-positive. Differential diagnoses include choroid plexus papilloma, papillary meningioma and metastatic papillary carcinoma. (Adapted from WHO)

**Synonyms:** - Papillary ependymoma