{"paper_id":"192c6270-e373-461d-8aa6-87b6ab13200f","body_text":"References\nSpaziani E, Picchio M, Di Filippo A, De Cristofano C, Ceci F, Stagnitti F (2009) Spontaneous umbilical endometriosis: a case report with one-year follow-up. Clin Exp Obstet Gynecol 36:263–264\nRosina P, Pugliarello S, Colato C, Girolomoni G (2008) Endometriosis of umbilical cicatrix: case report and review of the literature. Acta Dermatovenerol Croat 16:218–221\nMarkham SM, Carpenter SE, Rock JA (1989) Extrapelvic endometriosis. Obstet Gynecol Clin North Am 16:193–219\nFancellu A, Pinna A, Manca A, Capobianco G, Porcu A (2013) Primary umbilical endometriosis. Case report and discussion on management options. Int J Surg Case Rep 4(12):1145–1148\nGoldberg JM, Bedaiwy MA (2007) Recurrent umbilical endometriosis after laparoscopic treatment of minimal pelvic endometriosis: a case report. J Reprod Med 52(6):551–552\nMichowitz M, Baratz M, Stavorovsky M (1983) Endometriosis of the umbilicus. Dermatologica 167(6):326–330\nBagade PV, Guirguis MM (2009) Menstruating from the umbilicus as a rare case of primary umbilical endometriosis: a case report. J Med Case Rep 10(3):9326\nChatzikokkinou P, Thorfinn J, Angelidis IK, Papa G, Trevisan G (2009) Spontaneous endometriosis in an umbilical skin lesion. Acta Dermatovenerol Alp Panonica Adriat 18(3):126–130\nDessy LA, Buccheri EM, Chiummariello S, Gagliardi DN, Onesti MG (2008) Umbilical endometriosis, our experience. In Vivo 22(6):811–815\nLiu DT, Hitchcock A (1986) Endometriosis: its association with retrograde menstruation, dysmenorrhoea and tubal pathology. Br J Obstet Gynaecol 93:859–862\nMechsner S, Bartley J, Infanger M, Loddenkemper C, Herbel J, Ebert AD (2009) Clinical management and immunohistochemical analysis of umbilical endometriosis. Arch Gynecol Obstet 280(2):235–242\nVictory R, Diamond MP, Johns DA (2007) Villar’s nodule: a case report and systematic literature review of endometriosis externa of the umbilicus. J Minim Invasive Gynecol 14(1):23–32\nKyamidis K, Lora V, Kanitakis J (2011) Spontaneous cutaneous umbilical endometriosis: report of a new case with immunohistochemical study and literature review. Dermatol Online J 17(7):5\nYu CY, Perez-Reyes M, Brown JJ, Borrello JA (1994) MR appearance of umbilical endometriosis. J Comput Assist Tomogr 18(2):269–271\nLatcher JW (1953) Endometriosis of the umbilicus. Am J Obstet Gynecol 66(1):161–168\nKhaled A, Hammami H, Fazaa B, Zermani R, Ben Jilani S, Kamoun MR (2008) Primary umbilical endometriosis: a rare variant of extragenital endometriosis. Pathologica 100(6):473–475\nObata K, Ikoma N, Oomura G, Inoue Y (2013) Clear cell adenocarcinoma arising from umbilical endometriosis. J Obstet Gynaecol Res 39:455–461\nElm MK, Twede JV, Turiansky GW (2008) Primary cutaneous endometriosis of the umbilicus: a case report. Cutis 81:124–126\nConflict of interest\nNone.\nAuthor information\nAuthors and Affiliations\nCorresponding author\nRights and permissions\nAbout this article\nCite this article\nGhosh, A., Das, S. Primary umbilical endometriosis: a case report and review of literature. Arch Gynecol Obstet 290, 807–809 (2014). https://doi.org/10.1007/s00404-014-3291-8\nReceived:\nAccepted:\nPublished:\nIssue date:\nDOI: https://doi.org/10.1007/s00404-014-3291-8","source_license":"CC0","license_restricted":false}