1. Umbilical tumors: A case report and review of the literature;Blumenthal;S. Afr. Med. J.,1980
2. Umbilical metastasis from carcinoma of the stomach: Sister Joseph's nodule;Samitz;Arch. Dermatol.,1975
3. Umbilical metastasis from gynecologic malignancies: A primary carcinoma of the Fallopian tube;Galle;Obstet. Gynecol.,1981
4. Umbilical mass as a presenting symptom of endometrial adenocarcinoma;Bukovsky;Int. J. Gynaecol. Obstet.,1979
5. Tumors of the umbilicus;Charoenkol;Mt. Sinai J. Med.,1977