Anaplastic Oligodendroglioma, Not Otherwise Specified

**Semantic type:** Neoplastic Process

**Definition:** A central nervous system tumor with morphological features of anaplastic oligodendroglioma in which there is insufficient information on the IDH genes and 1p/19q codeletion status.

**Synonyms:** - Anaplastic Oligodendroglioma, NOS - Anaplastic Oligodendroglioma, NOS