RT Journal Article SR Electronic T1 Metformin Associates With Aggressive Features of Endometrial Cancer in Women With Type 2 Diabetes JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 821 OP 828 DO 10.21873/anticanres.14834 VO 41 IS 2 A1 ELINA URPILAINEN A1 REETTA ARIMA A1 PEETER KARIHTALA A1 ULLA PUISTOLA A1 ANNE AHTIKOSKI YR 2021 UL http://ar.iiarjournals.org/content/41/2/821.abstract AB Background/Aim: Preclinical studies on metformin use and endometrial cancer have been promising but epidemiological studies have reported variable results. This study aimed to assess if metformin use is associated with endometrial cancer aggressiveness and survival in women with type 2 diabetes (T2D). Patients and Methods: This retrospective hospital-based cohort consisted of women with T2D who were treated for endometrial cancer at the Oulu University Hospital, Finland, between 2007 and 2014. Results: The sample size was 121 patients: 58 metformin users and 63 metformin non-users. Intriguingly, type 2 histology, deep myometrial invasion and the presence of lymphovascular invasion were more common in the metformin user group. However, metformin use showed no association with overall survival and progression-free survival. Conclusion: Metformin use was associated with poorer prognostic factors in endometrial cancer patients with T2D.