Oligodendroglial Tumor

**Semantic type:** Neoplastic Process

**Definition:** A neoplasm of the central nervous system composed predominantly of cells morphologically resembling oligodendroglia. Oligodendroglial tumors histologically comprise a continuous spectrum ranging from well-differentiated neoplasms to frankly malignant tumors. WHO grading system recognizes two malignancy grades: WHO grade 2 for well-differentiated tumors (oligodendroglioma) and WHO grade 3 for anaplastic oligodendroglioma. (Adapted from WHO)

**Synonyms:** - Oligodendroglial Neoplasm - oligodendroglial tumor