Umbilical metastases (Sister Mary Joseph's sign) are the most common malignant complication involving the umbilicus and may be the presenting manifestation of visceral malignancy. Cancer patients may occasionally experience periumbilical ecchymosis (Cullen's sign), infection, hernia, or varices, each of which may require therapy. This review succinctly presents several umbilical complications that the clinician may encounter in patients with malignant disease.