结肠原发性恶性淋巴瘤临床上罕见,临床表现多较隐袭,常易误诊。本科自1960～1987年收治5例,均符合Dawson’s诊断标准。 一、病例介绍 例1,男,5岁,腹痛伴粘液血便4天。钡灌肠显示肠套叠。1963年10月2日剖腹探查见横结肠左段有2.5cm×2.5cm肿块套入脾曲,行结肠脾曲切 Primary malignant lymphoma of the colon is rarely seen clinically. The clinical manifestations are often more insidious and often misdiagnosed. The undergraduate course has been treated in 5 cases from 1960 to 1987, and both have met Dawson’s diagnostic criteria. I. Case Introduction Example 1, male, 5 years old, abdominal pain with mucus and bloody stool for 4 days. Barium enema shows intussusception. On October 2, 1963, a peritoneal exploration revealed a 2.5cm x 2.5cm mass in the left segment of the transverse colon, which was inserted into the splenic flexure.