Key words: Sister Mary Joseph; Umbilical metastasis; Cecum cancer]C utaneous metastases of malignant neoplasms are not common, occurring between 0.7 and 9 percent of autopsy evaluations. 1 Those to the umbilicus, also known as Sister Mary Joseph's nodule, are even more rare and represent only 10 percent of all secondaries to the skin. 2 These nodules usually arise from the gastrointestinal or genitourinary tract and may represent the first sign of a previously unknown primary tumor. This case demonstrates a Sister Mary Joseph's nodule caused by an unknown primary cancer of the cecum.
REPORT OF A CASEA 66-year-old female presented with a six-month history of umbilical lump, initially with a diameter of 0.5 cm, covered by erythematous skin. This was initially treated with conservative measures by a dermatologist, who three months later performed a biopsy. Histology showed cutaneous metastasis caused by a primary occult adenocarcinoma.Five months after the onset of the umbilical lesion, although the diagnostic work-up was still in progress, the patient required an emergency admission for intestinal obstruction. Physical examination of the abdomen showed an erythematous umbilical nodule (diameter of 1.5 cm) with irregular and ill-defined edges, attached to the underlying layers, and of fibrous consistency (Fig. 1). At laparotomy, there was a cecal neoplastic lesion attached to the anterior peritoneum in the umbilical area. A right colectomy with complete excision of the umbilical lesion was performed. Histology of the operative specimen showed a moderately differentiated adenocarcinoma. The skin and subcutaneous tissue specimen presented a central raised lesion consisting of metastases of the primary adenocarcinoma. Pathologic staging was pT3 pN2 pM1. After discharge, the patient received six courses of doxorubicin and died 21 months after surgery.
DISCUSSIONUmbilical neoplastic nodules are rare and can be caused by 1) primary tumor (38 percent of cases), 2) endometriosis (32 percent), and 3) metastases (30 percent).