Levonorgestrel-releasing intra-uterine device alone for managing early-stage endometrial cancer and endometrial hyperplasia with atypia in patients unfit for surgery: the ENDOIUD study

Objective: This study aimed to clarify the role of levonorgestrel-releasing intra-uterine device as a stand-alone therapy in managing patients with endometrial atypical hyperplasia/endometrial cancer who are not suitable for surgery, through the evaluation of cause-specific survival and the control of vaginal bleeding. Methods: This is a retrospective, multi-center study conducted in 9 referral gynecologic centers in Italy. Data regarding the clinical and oncological outcomes of patients with endometrial atypical hyperplasia/endometrial cancer (International Federation of Gynecology and Obstetrics Stage I) were analyzed. Patients were judged unsuitable for surgery due to an American Society of Anesthesiologists score ≥3 and the presence of multiple severe co-morbidities and, therefore, triaged to receive levonorgestrel-releasing intra-uterine device alone. Results: A total of 78 women were enrolled. Fifteen patients (19.2%) had a diagnosis of endometrial atypical hyperplasia, whereas the other 63 (80.8%) had endometrial cancer. The baseline hemoglobin levels averaged 11.6 (range; 6-16), increasing to 12.1 (range; 7.8-14.9) during follow-up after levonorgestrel-releasing intra-uterine device insertion (p = .003). No patient experienced any side effects, and bleeding control was rated as excellent in most patients. Median disease-free survival was 43 months (range; 5-120) and median overall survival was 45 months (range; 5-120). Conclusions: Levonorgestrel-releasing intra-uterine device alone is a safe and effective approach, showing no side effects, and a promising oncological outcome in women with early-stage endometrial atypical hyperplasia/endometrial cancer unfit for surgery. Future prospective studies are required to clarify how to select patient candidates for this therapy and how to predict response to levonorgestrel-releasing intra-uterine device.