RT Journal Article SR Electronic T1 Implementation of a sentinel lymph node mapping algorithm for endometrial cancer: surgical outcomes and hospital charges JF International Journal of Gynecologic Cancer JO Int J Gynecol Cancer FD BMJ Publishing Group Ltd SP ijgc-2019-000941 DO 10.1136/ijgc-2019-000941 A1 Katherine I Stewart A1 Jarrod S Eska A1 Ross F Harrison A1 Rudy Suidan A1 Ann Abraham A1 Gary B Chisholm A1 Larissa A Meyer A1 Shannon N Westin A1 Nicole D Fleming A1 Michael Frumovitz A1 Thomas A Aloia A1 Pamela T Soliman YR 2020 UL http://ijgc.bmj.com/content/early/2020/01/06/ijgc-2019-000941.abstract AB Introduction The purpose of this study was to compare operative times, surgical outcomes, resource utilization, and hospital charges before and after the implementation of a sentinel lymph node (SLN) mapping algorithm in endometrial cancer.Methods All patients with clinical stage I endometrial cancer were identified pre- (2012) and post- (2017) implementation of the SLN algorithm. Clinical data were summarized and compared between groups. Total hospital charges incurred on the day of surgery were extracted from the hospital financial system for each patient and all charges were adjusted to 2017 US dollars.Results A total of 203 patients were included: 71 patients in 2012 and 130 patients in 2017. There was no difference in median age, body mass index, or stage. In 2012, 35/71 patients (49.3%) underwent a lymphadenectomy. In 2017, SLN mapping was attempted in 120/130 patients (92.3%) and at least one SLN was identified in 110/120 (91.7%). Median estimated blood loss was similar between groups (100 mL vs 75 mL, p=0.081). There was a significant decrease in both median operative time (210 vs 171 min, p=0.007) and utilization of intraoperative frozen section (63.4% vs 14.6%, p<0.0001). No significant differences were noted in intraoperative (p=1.00) or 30 day postoperative complication rates (p=0.30). The median total hospital charges decreased by 2.73% in 2017 as compared with 2012 (p=0.96).Discussion Implementation of an SLN mapping algorithm for high- and low-risk endometrial cancer resulted in a decrease in both operative time and intraoperative frozen section utilization with no change in surgical morbidity. While hospital charges did not significantly change, further studies are warranted to assess the true cost of SLN mapping.