胃肠道恶性淋巴瘤分为原发性及继发性两种。前者诊断标准包括:(1)浅表淋巴结不受累。(2)正常血白细胞计数。(3)中膈淋巴结不受累。(4)手术仅见胃肠道及其所属区域淋巴结受累。(5)肝、脾正常。蛋白丢失性胃肠病是由多种病因引起的大量血浆蛋白丢失的一种综合症,主要特征为全身性浮肿和低血浆蛋白血症,以及体内蛋白质周转和分解增多。现将一例以蛋白丢失胃肠病为临床表现的原发性胃肠道恶性肿瘤报告于下: Gastrointestinal malignant lymphomas are divided into primary and secondary types. The former diagnostic criteria include: (1) superficial lymph nodes are not affected. (2) normal blood white blood cell count. (3) The lymph nodes in the mid-palate were not affected. (4) Only the gastrointestinal tract and its associated lymph nodes were involved in the operation. (5) Normal liver and spleen. Protein-losing gastro-intestinal disease is a syndrome in which a large number of plasma proteins are lost due to a variety of causes. The main features are systemic edema and low plasma proteinemia, as well as increased turnover and breakdown of protein in the body. A case of primary gastrointestinal malignancies with clinical manifestations of protein loss and gastrointestinal disease is reported below: