[A case of metastasis to the diaphragm from ascending colon cancer].

We reported a case of metastatic tumor to the diaphragm discovered by rising CEA after operation of ascending colon cancer. A 72-year-old female underwent right hemicolectomy on January 2005. After discharge, she received adjuvant chemotherapy by S-1, but a rise of CEA was shown. Based on exploratory findings, laparotomy was done with the diagnosis of metastasis to the liver(S7). A tumor was present in the right diaphragm, and contacted the liver(S7). Partial resection of the right diaphragm was performed. The removed specimen revealed the same histological findings of the last operated ascending colon. Metastasis to the diaphragm is very rare, especially a solitary one as in this case. Etiologically speaking, the tumor cells might be absorbed or have strayed into peritoneal stomata of the diaphragm.