中枢神经系统原发和继发性淋巴瘤均不多见,但随CT 的发展,对该病的认识在增加。中枢神经系统(CNS)原发性淋巴瘤罕见,大致占脑原发肿瘤的1.5%。免疫抑制病人罹患率较高。对其起源有争论,有很多命名,包括网织细胞肉瘤、微胶质瘤、周上皮肉瘤、外膜肉瘤、浆细胞性骨髓瘤、圆细胞肉瘤和网状组织细胞肉芽肿性脑炎。尽管命 Central nervous system primary and secondary lymphoma are rare, but with the development of CT, awareness of the disease is increasing. Central nervous system (CNS) primary lymphoma is rare, accounting for about 1.5% of primary brain tumors. Immunosuppressed patients attack rate higher. There are many sources of controversy about its origins, including many names for reticulosarcoma, microglioma, pericyte sarcoma, adventitial sarcoma, plasmacytoma, round cell sarcoma, and reticular cell granulomatous encephalitis. Although life