[Colonic lymphoma simulating cryptogenetic colitis associated with common variable hypogammaglobulinemia].

We report the case of a 72 year-old woman with late-onset common variable immunoglobulin deficiency who was hospitalized for diarrhoea and fever. Colonoscopy showed aphtoïd and deep ulcerations in the rectum, the sigmoid and transverse colon, suggestive of Crohn's disease. Histologic and immunohistochemical study revealed a low grade B cell mucosa-associated lymphoid tissue (MALT) lymphoma. This is an unusual presentation for colonic lymphoma, and the second case of colonic lymphoma associated with late-onset common variable immunoglobulin deficiency.