[A Case of Synchronous Double Cancer of Malignant Lymphoma of the Ileum and Carcinoma of the Jejunum].

The patient was a 72-year-old woman with a history of surgery for uterine, bladder, left breast, and rectal cancers. The patient was admitted to the emergency department due to abdominal pain and vomiting. Abdominal and pelvic computed tomography showed a mass lesion and bowel obstruction at the end of the ileum, and positron emission tomography showed a mass lesion with accumulation in the same area of the pelvis. The patient was referred to our department for surgical treatment. The tumor at the end of the ileum invaded the ileal conduit, abdominal wall, right-sided colon, and mouth of the ileum, and a right hemicolectomy of the colon was performed. Another mass was palpated in the pelvic jejunum during examination, and partial resection of the small intestine was performed simultaneously. The tumor at the end of the ileum was diagnosed as diffuse large B-cell lymphoma, whereas the jejunal tumor was diagnosed as tubular adenocarcinoma. Synchronous double cancer of malignant lymphoma of the ileum and carcinoma of the jejunum is rare. Herein, we report this case and review the relevant literature.