부산대학교 도서관

While the liver and lungs are the most common sites of metastasis from colon cancer, umbilical metastasis is rare. Usually this kind of metastasis becomes evident only when intra-abdominal malignancy is widespread with typical presentation of carcinomatosis demonstrated at laparotomy or on imaging study. We present two cases of colon cancer with umbilical metastasis without extensive dissemination. One patient developed a painful umbilical nodule 1.5 years after an uncomplicated colectomy. Another suffered an indurated umbilical nodule associated with an obstructive sigmoid colon cancer. Pathological analysis of these excised umbilical nodules both demonstrated cutaneous metastasis of colonic origin. Careful surveillance of the periumbilical region is indicated in patients with a colonic malignancy to avoid overlooking possible metastatic implants, in order to provide early curative treatment.