十二指肠恶性淋巴瘤很少见,占小肠恶性淋巴瘤的10~15%,绝大多数是非霍奇金淋巴瘤,组织学多数为B细胞型淋巴瘤[1-2]。十二指肠恶性淋巴瘤中,B细胞型淋巴瘤约占84%,T细胞型和不确定型者各占8%。该病由于发病率低、病史和临床表现缺乏特殊性,易误诊为慢性炎症和腺癌而延误治疗,因 Duodenal malignant lymphoma is rare, accounting for 10 to 15% of small intestinal lymphoma, the vast majority of non-Hodgkin’s lymphoma, histological majority of B-cell lymphoma [1-2]. In duodenal malignant lymphoma, B-cell lymphoma accounts for about 84%, T-cell type and uncertain type each account for 8%. Due to the low incidence of disease, history and clinical manifestations of the lack of specificity, often misdiagnosed as chronic inflammation and adenocarcinoma and delayed treatment, due to