Media type: E-Article Title: Primary umbilical endometriosis: A painful swelling in the umbilicus concomitantly with menstruation Contributor: Eğin, Seracettin; Pektaş, Bedri Aras; Hot, Semih; Mihmanlı, Veli Published: Elsevier BV, 2016 Published in: International Journal of Surgery Case Reports, 28 (2016), Seite 78-80 Language: English DOI: 10.1016/j.ijscr.2016.09.029 ISSN: 2210-2612 Origination: Footnote: Access State: Open Access