Abstract
A 59-year-old man visited a local doctor because of low abdominal pain and was referred to our hospital for careful investigation of an intra-abdominal tumor. Abdominal CT showed a necrotic mass measuring 12 cm in diameter in the abdominal cavity. Fiberoptic colonoscopy showed no apparent abnormalities. A laparotomy was performed, which revealed a tumor in the transverse mesocolon, that was found to be infiltrating the serosa of the colon. Peritoneal dissemination was detected in the mesentery proper, pouch of Douglas, and the surface of the left lateral segment of the liver. Tumorectomy, with removal of a part of the transverse colon was performed. Histopathological examination revealed no tubules, mucus production or neuroendocrine granules, suggestive of undifferentiated cancer. Mesenteric solid malignat tumors are extremely rare, and we discuss the origin of this cancer, together with a review of the literature.
