血管免疫母细胞性T细胞淋巴瘤(AITL)是少见的侵袭性外周T细胞淋巴瘤，主要的临床表现多变，累及全身淋巴结、肝、脾等部位，常有发热、皮疹、体质量下降，大部分患者伴有免疫功能异常，临床表现复杂多变。本研究通过对以胸腔积液、双肺多发渗出影为首发临床表现的AITL患者的各项辅助检查结果、诊疗经过进行回顾并复习相关文献，旨在提高临床医师对AITL的认识，选择合适的检查措施来提高诊断的阳性率。“,”Angioimmunoblastic T cell lymphoma (AITL) is an uncommon subtype of aggressive peripheral T cell lymphoma.The main clinical manifestations of AITL werechangeable, involving lymphadenopathy, hepatosplenomegaly, fever, rash, and other systemic symptoms.The majority of patients with abnormal immune function, clinical manifestation is complicated.In this study, weretrospected andreviewedthe examinationsof a patient who firstlymanifest as pleural effusion and multiple exudates of both lungs, aiming to improve clinicians′ understanding of the disease and select appropriate examination measures to improve the positive rate of diagnosis.