The purpose of this research study is to compare the uterus tissue of women who receive an intrauterine system to treat their endometrial hyperplasia with the uterine tissue of women who receive megestrol acetate to treat their hyperplasia. While both methods are commonly used in practice, investigators would like to see what effects each treatment has on uterine tissue.
Primary Objective: To determine if Levonorgestrel-releasing intrauterine system is of equal efficacy to the standard systemic progestin therapy (megestrol acetate) based on endometrial sampling at 6 months after randomization. Non-inferiority analysis. Secondary Objective(s): * To determine the safety of each treatment modality. * Determine the feasibility of transvaginal ultrasound to predict treatment response.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
The control arm will consist of oral progesterone therapy (megestrol acetate 160mg po daily). The intervention will be administered on an outpatient basis.
Participants in the comparison arm will have a levonorgestrel intrauterine device placed in the office or in the operating room if the office procedure not tolerated or if they have not had a prior dilation and curettage.
Histologic Response Scoring of Biopsy Specimens
The primary outcome is a response score (0: no response, 1: incomplete response, 2: complete response): Score -1 will be assigned to specimens with progression of disease (ie. Endometrial carcinoma); Score 0 will be assigned to specimens with atypical hyperplasia; Score 1 will be assigned to specimens with benign hyperplasia and will be indicative partial response to therapy; Score 2 will be assigned to specimens without hyperplasia and will be indicative of complete response to therapy. All study cases will be reviewed by a pathologist and all cases will be scored following the standard 2014 WHO classification of endometrial hyperplasia. Investigators will compare the estimated 90% confidence interval (CI) of the levonorgestrel-releasing Intrauterine system versus the standard therapy from the noninferiority trial to a predefined margin.
Time frame: 6 months
Number of Toxicities for Each Treatment
Toxicities for each treatment modality based on standard toxicity scoring using NCI Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. Investigators will compare the number of toxicities between the two treatment groups using chi-squared tests.
Time frame: Up to 8 months
Pathological Response to Treatment
The pathological response variable will be treated as a binary variable, the Wilcoxon rank sum test will be used to explore the association between measurement of the endometrial stripe and the response outcome at each visit. Score -1 will be assigned to specimens with progression of disease (ie. Endometrial carcinoma); Score 0 will be assigned to specimens with atypical hyperplasia; Score 1 will be assigned to specimens with benign hyperplasia and will be indicative partial response to therapy; Score 2 will be assigned to specimens without hyperplasia and will be indicative of complete response to therapy.
Time frame: Up to 8 months
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