Adenomyosis: Is It A Confounder Or An Innocent Companion In Patients With Endometrial Hyperplasia?
Abstract Purpose: To evaluate the effect of adenomyosis on the discordance of pathologic findings in patients with endometrial hyperplasia (EH) before hysterectomy.Methods: Two hundred seventeen patients who were diagnosed as having EH via endometrial sampling and underwent hysterectomy within 3 months were included in this retrospective study. The patients’ preoperative and postoperative pathologic findings were compared and discordant results were defined as overdiagnosed and underdiagnosed.Results: The rate of concurrent endometrial carcinoma (EC) among all EH was 22.11%, whereas this rate was 41.4% in EH with atypia. There was no difference between EH subtypes in terms of demographic characteristics and coexisting myometrial lesions. The discordance between preoperative endometrial sampling and final hysterectomy specimen results was evaluated, and patients with underdiagnosis were older (60.5 years, p<0.001), had a higher BMI (30.84 kg/m2, p<0.001), were mostly postmenopausal (p<0.001), had lower parity numbers (median=2, p=0.002), and had a lower rate of co-existing adenomyosis (p=0.009). The rates of co-existing leiomyomas between the groups were not different. No effect of other demographic characteristics was observed in the multivariate regression analysis; however, the presence of adenomyosis was a significant independent risk factor affecting a 5.8-fold increase in overdiagnosis (-1.50; OR: 0.17 (0.05-0.50) p=0.002) and 4.5-fold increase in underdiagnosis (-1.50; p=0.005).Conclusion: Co-existing adenomyosis could lead to discordance of the pathologic findings in women with EH diagnoses before hysterectomy.