Abstract
A 77-year-old man had a left lower lobectomy by video-assisted thoracoscopic surgery for left lung cancer about 8 months prior. On pathology a pleomorphic carcinoma (pT1N0M0 pStage IA) was finally diagnosed ; the patient was followed. He was admitted when he developed vomiting ; abdominal computed tomography (CT) revealed an intussusception of the small bowel. An intussusception due to a tumor of the small bowel was suspected and a laparotomy was performed. A 20-cm long jejunojejunal intussusception was found ; a tumor was found at the tip of the intussusception. A partial resection of the jejunum was performed. On pathology, the tumor was diagnosed as a metastasis of the pleomorphic carcinoma. The patient was discharged 10 days after the operation. Two months later, he complained of pain in the right groin area, pelvic CT showed a recurrence of the carcinoma in the right pelvic cavity that had invaded into the right piriform muscle and right internal obturator muscle. The tumor decreased in size with radiation therapy. Pleomorphic carcinoma of the lung is quite rare. This case is only the 3rd case of intussusception due to small bowel metastasis reported in the English language and Japanese literature to date.
