Objectives: The aims of the present study were firstly, to evaluate the effect of estrogen on the cytology of buccal mucosa during the menstrual cycle and at menopause, and, secondly, to analyze the presence of estrogen receptors in the epithelial cells of buccal mucosa using immunohistochemical methods.
Methods: The cytological samples of buccal mucosa from 10 healthy young women (mean age 24 years) were taken on every day of the menstrual cycle and stained according to Papanicolaou. A single cytological sample of buccal mucosa was also collected from 20 healthy postmenopausal women (mean age 66 years) using no hormone replacement therapy.