星形细胞肿瘤是原发性脑肿瘤中最常见的一类肿瘤。1993年WHO分类将脑肿瘤分为弥漫性和局限性两大类。弥漫性星形细胞肿瘤包括胶质母细胞瘤、间变性(恶性)星形细胞瘤和低度恶性星形细胞瘤 ;局限性星形细胞肿瘤包括毛细胞型星形细胞瘤、多形性黄色星形细胞瘤和室管膜下巨细胞星形细胞瘤。本文对各种星形细胞肿瘤的病理、临床、CT、MRI特征、诊断和鉴别诊断要点进行阐述 Astrocytic tumors are the most common type of tumor in primary brain tumors. 1993 WHO classification of brain tumors into diffuse and limitations of the two categories. Diffuse astrocytic tumors include glioblastoma, anaplastic (malignant) astrocytoma, and low grade astrocytoma; localized astrocytic tumors include pilocytic astrocytoma, pleomorphic yellow Astrocytoma and subependymal giant cell astrocytoma. This article describes the pathology, clinical, CT, MRI features, diagnosis and differential diagnosis of various astrocytic tumors