Oligoastrocytoma

**Semantic type:** Neoplastic Process

**Definition:** A WHO grade 2 tumor composed of a conspicuous mixture of two distinct neoplastic cell types morphologically resembling the tumor cells in oligodendroglioma and diffuse astrocytoma. (WHO)

**Synonyms:** - GLIOMA, MIXED, BENIGN - Mixed Astrocytic-Oligodendroglial Neoplasm - Mixed Astrocytic-Oligodendroglial Tumor - Mixed Astrocytoma-Oligodendroglioma - Mixed Oligo-Astrocytoma - WHO Grade 2 Mixed Glioma - WHO Grade II Mixed Glioma - oligoastrocytoma