Adult Anaplastic Astrocytoma

**Semantic type:** Neoplastic Process

**Definition:** An astrocytoma occurring in adults that is characterized by the presence of high mitotic activity, cytologic atypia, and architectural distortion.

**Synonyms:** - Adult Grade 3 Astrocytoma - Adult Grade III Astrocytoma - Adult Undifferentiated Astrocytoma - Anaplastic Astrocytoma - Anaplastic Astrocytoma of Adult - Anaplastic Astrocytoma of the Adult - Grade 3 Adult Astrocytic Neoplasm - Grade 3 Adult Astrocytic Tumor - Grade 3 Adult Astrocytoma - Grade III Adult Astrocytic Neoplasm - Grade III Adult Astrocytic Tumor - Grade III Adult Astrocytoma - Undifferentiated Astrocytoma of Adult - Undifferentiated Astrocytoma of the Adult