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2067 Background: A patient’s understanding of surgery is often limited, especially in the setting of complex oncologic procedures. A recent review found that interventions such as the use of written materials, videos, and websites, improve patients’ knowledge of the procedure and their satisfaction with decision making. We sought to determine if a video-based approach in patients undergoing robotic endometrial cancer staging improves satisfaction with perioperative counseling. Secondary objectives were physician satisfaction, patient comprehension, and visit length. Methods: From 2018-2019, patients were randomized to standard physician education or multimedia-based education, which included watching two novel animated videos followed by focused physician counseling. Basic demographic information was collected. Patient satisfaction was assessed using the Client Satisfaction Questionnaire-8 (CSQ-8, a validated satisfaction survey, scored 8-32) and a global satisfaction score (10-point scale). Physician satisfaction was assessed using a global satisfaction score. Comprehension was assessed with a 9 question survey at 3 time points. Descriptive statistics were used to compare groups. Results: Of 76 patients randomized, the majority were Caucasian (68%), 50-70 years old (70%), and had at least some college education (75%). Most patients had undergone prior surgery (83%) and one fourth had a prior cancer diagnosis. Demographic variables and surgical history were similar between groups. The video patients reported higher satisfaction on the CSQ-8 (31.57 ± 1.02 vs 30.62 ± 2.09, p < 0.05) and global satisfaction score (9.95 ± 0.23 vs 9.74 ± 0.55, p < 0.05). There was no difference in comprehension scores between groups at either the initial or postoperative visit. At the time of surgery, comprehension scores were higher in the standard education group compared to the video group (p < 0.01). There was no difference in physician satisfaction between groups. Among the video group, there was improvement in physician satisfaction between the first and second half of patients enrolled (p < 0.05). There was no difference in visit length. Conclusions: While multimedia education improved patient satisfaction in the preoperative setting, this was not clinically significant. Provider satisfaction improved over time with the use of a video aid. Multimedia education may be implemented in perioperative counseling based on provider preference and consideration should be made for further study of satisfaction after the initial implementation period. Clinical trial information: NCT03899441.

5592Background: We sought to evaluate the short-term response rate, toxicity and potential molecular changes following treatment with metformin for simple (SEH) and complex endometrial hyperplasia without atypia (CEH). Methods: Women with newly diagnosedsimple or complex endometrial hyperplasia without atypia by endometrial biopsy or dilation & curettage were enrolled onto a prospective multi-institutional single arm clinical trial, and treated with metformin for 3 months (850 mg daily x 4 weeks, then twice daily for 8 weeks), followed by repeat biopsy. Pathologic response and toxicity (CTCAE 4.1) were assessed. Expression of the estrogen (ER) and progesterone (PR) receptor and the metformin transporters (OCT1, OCT3, PMAT, MATE1, MATE2) were evaluated by immunohistochemistry in formalin-fixed, paraffin-embedded endometrial specimens pre- and post-treatment. Slides were scanned using the Aperio ScanScope, and digital images were analyzed using Aperio ImageScope software. We report proportions as %, along w...

5596 Background: Robotic surgery has been shown to be feasible in obese patients. However, there remains concern about the safety of robotic surgery in obese women who need gynecologic surgery, as ...