肺原发性淋巴瘤,发病率低,临床症状缺乏特异性,影像学有一定的特征,现将其诊断与鉴别诊断综述如下。1定义肺原发性淋巴瘤,是结外淋巴瘤,比较少见,大多数为肺非霍奇金淋巴瘤。发病率不及结外淋巴瘤的10%,占所有淋巴瘤的0.36%~1.20%[1]。它的发病频率、细胞来源,组织学类型以及临 Primary pulmonary lymphoma, the incidence is low, the lack of specificity of clinical symptoms, imaging has certain characteristics, now the diagnosis and differential diagnosis are summarized below. 1 defined pulmonary primary lymphoma, is extranodal lymphoma, relatively rare, most of the lung non-Hodgkin’s lymphoma. The incidence is less than 10% of extranodal lymphoma, accounting for 0.36% to 1.20% of all lymphoma [1]. Its frequency of incidence, cell origin, histological type and presence