Evaluation of endometrial changes and p53 expression in tamoxifen treated women: comparison of various methods.

OBJECTIVE To compare transvaginal sonography (TVS), sonohysterography (SHG), hysteroscopy and endometrial aspiration (EA) and p53 expression in assessing endometrial abnormalities in women on tamoxifen. METHODS In a cross sectional study of 50 pre- and post-menopausal women receiving tamoxifen for > 2 years, all participants underwent TVS and EA. Those with endometrial thickness > 4 mm on TVS underwent hysteroscopy and SHG. Serum p53 antibody and p53 immunohistochemistry were tested in all women. RESULTS The sensitivity and specificity when compared with histopathology as the reference standard were as follows: TVS 100% and 33.3%, SHG 85.7% and 50%, hysteroscopy 92.8% and 80.8%, serum p53 50% and 83.3%, and p53 immunohistochemistry 57.1% and 61.1%. Prevalence of endometrial abnormalities was not significantly different in asymptomatic and symptomatic women. CONCLUSION Tamoxifen-users require routine testing for endometrial evaluation. TVS followed by hysteroscopy and biopsy is an effective option. p53 expression correlates with histological abnormalities.