Olivia Hershorn

June 2020

  • Residency Program: University of Manitoba
  • Supervisors:


Olivia Hershorn is a third-year General Surgery resident at the University of Manitoba in Winnipeg. She completed a Bachelor of Science in Behavioural Neuroscience at Concordia University in Montreal and her medical school training at McGill University.

Last year, she pursued a Master of Science in Surgery at the University of Manitoba. Her thesis focuses on a mixed-methods approach to elucidating communication practices between General Surgeons and Gastroenterologists as it pertains to the appropriate use of repeat preoperative endoscopy for patients undergoing colorectal cancer surgery. She is currently the co-Chief Resident for the Manitoba General Surgery program and interested in pursuing a fellowship in colorectal surgery.



Olivia’s research focus in the colorectal cancer population extends back to her medical training where she worked with Dr. Liane Feldman’s lab at the Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation investigating the effectiveness of ERAS protocols on patient outcomes.

Her current research focus and thesis is unique in that it combines qualitative physician interviews with Gastroenterologists and General Surgeons, as well as a retrospective chart review over a 10-year period to investigate why repeat preoperative endoscopy occurs and how unnecessary procedures can be minimized. In addition, her work seeks to set a foundation to enhance communication amongst endoscopy specialists, improve local practices, and develop evidence-based guidelines for endoscopic documentation.


Selected Publications

Hershorn O, Park J, Singh H, Clouston K, Vergis A, Helewa RM. Rates and predictors of repeat preoperative endoscopy for elective colorectal resection: how can we avoid repeated procedures? 2020 ASCRS Annual Scientific Meeting, Boston, MA, June 6-10, 2020.

Hershorn O, Park J, Singh H, Restall G, Clouston K, Vergis A, Helewa RM. Variability in communication and reporting practices between Gastroenterologists and Surgeons contributes to repeat preoperative endoscopy for colorectal neoplasms: a qualitative analysis. 2020 ASCRS Annual Scientific Meeting, Boston, MA, June 6-10, 2020.

Hershorn O, Park J, Singh H, Clouston K, Vergis A, Helewa RM. Predictors and rates of endoscopic tattoo localization during elective colorectal resection for benign and malignant lesions. 2020 SAGES Annual Meeting. Cleveland, OH, April 1-4, 2020

Pecorelli, N; Hershorn, O; Baldini, G; Fiore, JF; Stein, BL; Liberman, S; Charlebois, P; Carli, F; Feldman, LS. Impact of adherence to care pathway interventions on recovery following bowel resection within an established enhanced recovery program. Surgical endoscopy. 2017; 31(4): 1760-71.

Fiore, JF, Castelino,T, Pecorelli, N, Niculiseanu, P, Balvardi S, Hershorn, O, Liberman, S, Charlebois, P, Stein B, Carli, F, Mayo N, Feldman, LS. Ensuring early mobilization within an enhanced recovery program for colorectal surgery: a randomized control trial. Annals of Surgery. 2017; 266(2): 223-31.