A case of adult intussusception caused by transverse colon cancer

An 86-year-old man was admitted complaining of abdominal pain. A tender hard mass was palpated in the right upper abdomen. On computed tomography, intussusception was visualized with a mass about 4 cm in size. Gastrographin enema examination showed typical so-called crab finger's sign findings. The mass was suspected to be cancer of the transverse colon which had led to the intussusception. Operation was performed. Histopathologically, the tumor was type 1 and poorly differentiated adenocarcinoma. Intussusception in adults is rarely caused by transverse colon cancer, with only 18 cases reported in Japan. We discuss our case in light of our review of the literature.