Endometrial feature and uterine blood flow in abnormal uterine bleeding.

We used the transvaginal ultrasound examination in women with abnormal uterine bleeding prior to conventional D&C. It is a simple, non-invasive technic, convenient and accepted by all patients. The endometrial thickness of less than 6 mm is compatible with atrophic endometrium, but of more than 17.7 mm will be malignancy. A cut-off value for endometrial abnormality of 17 mm yielded a sensitivity of 100 per cent, specificity of 96.9 per cent and a positive predictive value of 85.7 per cent respectively (Fisher exac test). When endometrial thickness is more than 17 mm, intratumor flow mean resistance indices can be used to reduce false positive rate.