Abstract
A 68-year-old man was admitted to our hospital due to lower abdominal pain and constipation. Colonoscopy showed suL-bmucosal tumor-like lesions with central ulceration showing a bull's eye sign in the transverse colon and splenic flexu.re. Histological examina-tion of biopsy specimens obtained from these lesions suggested metastasis from primary lung cancer with large cell type. On CT examination, a space occupying lesion of the spleen was highly suspected to be metastatic. The incidene of the metastasis to the coon in Lung cancer is 2.3-3.0%. However, clinically confirmed colonic metastasis is extremely rare. An unique endoseopic appear-ance shown in this case is more likly metastatic colonic cancer secondary to Lung cancer.
