Endometrial hyperplasia: Value of endometrial thickness in ultrasonographic diagnosis and clinical significance

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Abstract
The records of 90 patients with histologically proven endometrial hyperplasia (EH) were reviewed retrospectively. Eleven of these patients had pelvic ultrasound examinations available. These were compared to the pelvic ultrasound examinations of 19 patients with a histologically normal endometrium, available in 126 consecutive patients seen over the same period of time. Patients with EH had a mean endometrial thickness of 18.8 mm (range 8 mm to 45 mm) vs 5.4 mm (range 2 mm to 10 mm) in the control group. This difference in thickness was statistically significant (p ≪ .01). The specificity and sensitivity of endometrial thickness in the diagnosis of EH were 100% and 81%, respectively, when 10 mm was taken as the upper limit of normal. Ultrasonographically demonstrable endometrial characteristics can differentiate EH from normal endometrium in a great majority of cases. The clinicopathological significance of EH is discussed.