Objectives: to evaluate the hormonal status and receptor apparatus of the eutopic endometrium in patients with adenomyosis who had a history of papillary thyroid carcinoma.Materials and methods. 63 women were examined: group I consisted of 31 patients with adenomyosis and papillary carcinoma of the thyroid gland in history, group II consisted of 32 patients with adenomyosis and unencumbered thyroid status. The severity of pelvic pain was assessed using a visual analog scale. The level of luteinizing and follicle-stimulating hormones, estradiol, prolactin, thyroid-stimulating hormone and progesterone was determined in the peripheral blood serum. The material for the morphological study was obtained using endometrial pipelle biopsy. Morphological research was performed on 30 biopsies of eutopic endometrium (15 samples from patients of group I and 15 samples from patients of group II). Immunohistochemical study was performed on 20 paraffin sections (10 samples from patients of group I and 10 samples from patients of group II) using monoclonal antibodies.Results. High ER-α expression was detected in the endometrial glandular epithelial cells (EGECs) in 80 and 50% of samples of patients from groups I and II, respectively (р < 0.05), no significant difference in the number of positive cells was found between groups. High ER-α expression in endometrial stromal cells (ESCs) was detected in 50% of samples in patients from both groups, the number of positive cells was significantly higher in the endometrium specimens from I group (84.0 (10.5%) in group I versus 62.2 (12.3%) in group II, р < 0.05). High PgR expression in the EGECs was detected in 90 and 75% of samples in groups I and II respectively (р < 0.05), ESCs expressed PgR in 100% of samples of patients from both groups. Significant difference in the number of positive cells was found between groups – 96.0 (8.4%) and 84.9 (12.6%) in groups I and II respectively, р < 0.05.Conclusions. Our results suggest that the ectopic endometrium in female thyroid cancer survivors with adenomyosis has high expression of ER and PgR, that may have important implications for the survival and proliferation of the eutopic endometrial cells. Further research is needed to optimise prevention and treatment algorithms for this group of patients.