1. Umbilical metastasis or Sister Mary Joseph's nodule;Dubreuil;Int J Dermatol,1998
2. Epidermal inclusion cyst of the umbilicus following abdominoplasty;Andreadis;Plas Surg Nursing,2007
3. A naval surgeon's approach to the draining umbilicus;Stroup;J Laparo Adv Surg Tech,2007
4. Omphalith-associated relapsing umbilical cellulitis: recurrent omphalitis secondary to hair-containing belly button bezoar;Cohen;Cutis,2010
5. Incarcerated umbilical hernia as the debut of abdominal actinomycosis;Orti-Rodriquez;Cir Cir,2012