Efficacy of Dienogest in Thinning the Endometrium Before Hysteroscopic Surgery

Michiko Kodama, Masayo Onoue, Hirofumi Otsuka, Namiko Yada-Hashimoto, Noriatsu Saeki, Takahiro Kodama, Tomoko Wakasa, Takao Funato
Journal of Minimally Invasive Gynecology · 2013 · vol. 20(6) , pp. 790–795 · doi:10.1016/j.jmig.2013.04.020 · PMID:23830718 · W2061256785
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Dienogest effectively thinned the endometrium in patients undergoing hysteroscopic surgery by reducing endometrial thickness and improving surgical conditions.

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Abstract

Study objectiveTo investigate the efficacy of administration of dienogest to thin the endometrium before hysteroscopic surgery and to evaluate the surgical outcome.DesignRetrospective clinical study (Canadian Task Force classification III).SettingCommunity hospital.PatientsTwenty-six patients who underwent hysteroscopic surgery for treatment of endometrial polyps or submucous myomas <25 mm.InterventionsBefore hysteroscopic surgery, 13 patients (dienogest group) received 2 mg dienogest orally for 2 weeks, and 13 patients (GnRH group) received a gonadotropin-releasing hormone agonist subcutaneously 1 to 3 times every 4 weeks, and 4 of those received hormone therapy after surgery. Endometrial thickness, serum estradiol and progesterone concentrations, duration of surgery, weight of tissue removed, surgical field visualization, and time to resumption of spontaneous menstruation were recorded.Measurements and main resultsEndometrial thickness decreased from approximately 7.0 mm to 3.9 mm in the dienogest group. Duration of surgery and weight of tissue removed were similar between groups. The surgical field was clearly visualized in 12 patients in each group. Spontaneous menstruation resumed at approximately 22.0 days after hysteroscopic surgery in the dienogest group; in contrast, no resumption of spontaneous menstruation was observed within the first postoperative month in the GnRH group. No patients had perioperative complications, and none exhibited any residual tumor.ConclusionAdministration of dienogest for 2 weeks thinned the endometrium and yielded favorable surgical outcomes, similar to those with GnRH agonists. Administration of dienogest may be an effective and convenient treatment before hysteroscopy.

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