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Aim: The aim of this study was to review diagnostic/therapeutic strategies of umbilical endometriosis managed in our department and evaluate the effectiveness of these strategies., Methods: Medical records for patients with diagnosis of endometriosis managed from 1999 through 2011 in the University of Tokyo Hospital were retrospectively reviewed. Cases with diagnosis of umbilical endometriosis were identified. Clinical information of age, gravida, parity, histories of surgery and oral contraceptive (OC), management for the disease prior to the first visit, symptoms, patients' desire for pregnancy, diagnostic/therapeutic methods and prognosis were reviewed and summarized., Results: During the period, 2530 patients with diagnosis of endometriosis were identified. Seven patients had diagnosis of umbilical endometriosis, giving an incidence of 0.29% of all endometriosis cases and 5.6% of extragenital endometriosis cases. A definitive diagnosis was made by histological examination following a biopsy (two cases) or a resection (three cases). A clinical diagnosis was made by empirical treatment with OC (one case) or dienogest (one case). With regard to therapy, three patients chose expectant management and did not require therapeutic intervention. Three patients began OC and symptoms were well controlled in all patients. One patient who wished to conceive chose a wide resection followed by umbilical reconstruction. She became pregnant afterwards and recurrence was not reported., Conclusion: There are various options of diagnostic/therapeutic strategies, such as empirical treatments and OC that can provide individualized management of umbilical endometriosis, congruent with the severity of patient symptoms, age and desire for pregnancy., (© 2013 The Authors. Journal of Obstetrics and Gynaecology Research © 2013 Japan Society of Obstetrics and Gynecology.)