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ORIGINAL RESEARCH |
From the Departments of 1Perinatology and Gynecology, University Medical Centre, Utrecht; 2Obstetrics and Gynecology, Academic Medical Centre, Amsterdam; 3Obstetrics and Gynecology, Erasmus Medical Center, Rotterdam; 4Clinical Epidemiology and Biostatistics, Academic Medical Centre, Amsterdam; 5Obstetrics and Gynecology, Diakonessenhuis, Utrecht; 6Meander Medical Center, Amersfoort; 7Obstetrics and Gynecology, Mesos Medical Center, Utrecht; 8Obstetrics and Gynecology, TweeSteden Hospital, Tilburg; and 9Obstetrics and Gynecology, Rijnstate Hospital, Arnhem, the Netherlands.
OBJECTIVE: To estimate the incidence of recurrent postmenopausal bleeding among women who were diagnosed with an endometrial thickness greater than 4 mm.
METHODS: We designed a prospective cohort study and included consecutive women not using hormone replacement therapy, presenting with a first episode of postmenopausal bleeding. We evaluated patients who had an endometrial thickness greater than 4 mm at transvaginal ultrasonography and benign endometrial sampling; presence of carcinoma was ruled out by office endometrial sampling, hysteroscopy, and/or dilation and curettage. Time until recurrent bleeding was measured, and diagnosis at recurrent bleeding was recorded.
RESULTS: Among 318 patients who had an endometrial thickness greater than 4 mm, 222 patients had benign histology results and were available for follow-up. During follow-up, 47 (21%, 95% confidence interval 16–27%) patients had recurrent bleeding, with a median time to recurrent bleeding of 49 weeks (interquartile range 18 to 86 weeks). There was no difference with respect to recurrence rate between patients with polyp removal, patients with a normal hysteroscopy, and patients with office endometrial sampling alone at the initial workup. Two patients were diagnosed with atypical endometrial hyperplasia upon recurrent bleeding.
CONCLUSION: The recurrence rate of postmenopausal bleeding in women with endometrial thickness greater than 4 mm is 20%. This recurrence rate is not related to incorporation of hysteroscopy or polyp removal at the initial workup.
LEVEL OF EVIDENCE: II
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