原发中枢神经系统淋巴瘤 (primary central nervous systemlym phom a,PCNSL)是指原发于颅内、眼、脊髓和软脑膜等部位的非霍奇金淋巴瘤 ,既往曾称为小神经胶质细胞瘤、网状细胞肉瘤或血管周围肉瘤。本病占原发中枢神经系统肿瘤的 5 %以下 ,占全部恶性淋巴瘤的 1%～ 2 %。免疫 Primary central nervous system lymphoma (primary central nervous system lymphoma, PCNSL) is the primary non-Hodgkin’s lymphoma in the brain, eye, spinal cord and pia mater and other parts of the former known as microglial cells Tumor, reticulocytic sarcoma or perivascular sarcoma. The disease accounts for less than 5% of primary central nervous system tumors, accounting for 1% to 2% of all malignant lymphoma. Immune