[Three cases of primary malignant lymphoma of the small intestine].

Three cases of a primary malignant lymphoma of the small intestine are reported. Case 1: a 62-year-old male who underwent an emergency operation for a jejunal perforation of a malignant lymphoma (aneurysmal type, Stage III, diffuse small cell type). The patient is still alive 16 months after the operation. Case 2: A 54-year-old female with complaints of an abdominal pain and anemia was found to have three tumors (one in the jejunum, two in the ileum) that were determined as being malignant lymphomas (all of the aneurysmal type, Stage III, diffuse medium-sized cell types). This patient is still alive 11 months after the operation. Case 3: A 40-year-old male with a complaint of an abdominal pain was found to have a malignant lymphoma of the ileum (aneurysmal type, Stage III, a diffuse medium-sized cell type). This patient died on the 60th day after the operation.