神经胶质瘤是一种中枢神经系统的肿瘤疾病，源自神经胶质细胞的病变。神经胶质瘤通常出现于脑部（称为脑神经胶质瘤），但也有可能出现于其他神经，如视觉神经。

A glioma is a type of tumor that starts in the brain or spine. It is called a glioma because it arises from glial cells. The most common site of gliomas is the brain. Gliomas make up about 30% of all brain and central nervous system tumors and 80% of all malignant brain tumors.