Anaplastic Oligodendroglioma

**Semantic type:** Neoplastic Process

**Definition:** A WHO grade 3 oligodendroglioma with focal or diffuse malignant morphologic features (prominent nuclear pleomorphism, mitoses, and increased cellularity).

**Synonyms:** - Anaplastic oligodendroglioma - Malignant Oligodendroglioma - Oligodendroglioma, Malignant - Oligodendroglioma, anaplastic - Undifferentiated Oligodendroglioma - WHO Grade 3 Oligodendroglial Neoplasm - WHO Grade 3 Oligodendroglial Tumor - WHO Grade III Oligodendroglial Neoplasm - WHO Grade III Oligodendroglial Tumor