Material and Method: Women with PCOS and abnormal menstrual pattern were enrolled into this cross-sectional study. Endometrial thicknesses were evaluated using transvaginal sonography. Endometrial aspiration was performed with endometrial aspirator and sent for pathology.

Results: Out of 52 PCOS patients with abnormal menstrual pattern, nine (17.3%) and one (1.9%) had endometrial hyperplasia and endometrial cancer, respectively. There was no significant difference in mean endometrial thickness between those who had abnormal and normal endometrium (8.19±2.58 mm and 7.76±4.03 mm, respectively). However, BMI and age of patients with abnormal endometrium were significantly higher and older than those with normal endometrium (p = 0.031 and p = 0.009, respectively).

Conclusion: Nineteen point two percent (19.2%) of patients with PCOS and abnormal menstrual pattern had endometrial hyperplasia or endometrial cancer. Endometrial thickness was not different between those with abnormal and normal endometrium.

Keywords: Polycystic ovary syndrome (PCOS), Abnormal menstrual pattern, Endometrial hyperplasia, Endometrial carcinoma