Reproductive and oncologic outcomes after progestin therapy for endometrial complex atypical hyperplasia or carcinoma

Objectives This study evaluated fertility and oncological outcomes in women with complex atypical hyperplasia (CAH) or nonmyoinvasive grade 1 endometrioid endometrial carcinoma (EM) who desired fertility-sparing therapy. Study Design The retrospective cohort study included women younger than 45 years with CAH or EM who desired fertility-sparing treatment at our institution. Only patients for whom both oncological treatment and pregnancy outcomes were available were included. Statistical analyses were performed using a Fisher exact test, Pearson χ² test, and Spearman rank correlation test, as appropriate. Results Seventy-five patients were identified, and 23 (13 CAH, 10 EM) met the inclusion criteria. All 23 patients had at least 1 prior pregnancy. Treatment was split between oral progesterone only (38.5% CAH, 40% EM), levonorgestrel intrauterine device only (30.8% CAH, 20% EM), and both (30.8% CAH, 40% EM). After a median follow-up of 13 months (range, 3-74 months), 9 patients (46.2% CAH, 30% EM, P =.39) had persistent/progressive disease. Eight patients (30.8% CAH, 40% EM, P =.69) ultimately had a hysterectomy, and 3 of these (13.0%) were found to have persistent/progressive disease. Median time from diagnosis to hysterectomy was 13 months (range, 4-56 months). Fourteen of the 23 patients utilized assisted reproductive techniques (60.9%); 12 underwent IVF and 2 chose a gestation carrier. Seven clinical intrauterine pregnancies (30.4%) resulting in 6 live births (26.1%) were found in the entire cohort. Conclusion Fertility-sparing treatment for CAH and grade 1 endometrial cancer is feasible with progestin therapy and leads to clinically meaningful rates of pregnancy in young women who desire fertility.