Metastatic umbilical cancer--Sister Mary Joseph's nodule: report of two cases.

Two cases of metastatic umbilical carcinoma (Sister Mary Joseph's nodule) are reported. In one of the cases, the umbilical metastasis was the first sign of the disease, whereas in the other case, the patient had a 5-year history of internal malignancy when the umbilical nodule appeared. In both cases, the cutaneous metastasis was followed by death in a short period of time.