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Reto Baertschiger

Title: Paediatric Surgeon, Division of General and Thoracic Surgery
Designations: MD, PhD, FACS, FAAP
Phone: 416-813-7654 ext. 204310
Fax: 416-813-7477
Alternate Contact Name: Elizabeth Greczylo
Alternate Email:
U of T Positions: Assistant Professor, Department of Surgery

Research Positions

Scientist Track Investigator
Genetics and Genome Biology


Dr. Reto M. Baertschiger joined the Division of General and Thoracic Surgery at The Hospital for Sick Children (SickKids) on August 1, 2019 with a special interest in paediatric surgical oncology and liver tumors.  He has been working as a general paediatric surgeon and with a special focus on the surgical care of children with solid tumors, in close collaboration with the oncology team.

Reto Baertschiger was born and raised in Switzerland and went to medical school in Lausanne. After proceeding with basic science research in Geneva, where he obtained his PhD in 2008, he moved to the United States to train in General Surgery and Paediatric Surgery in Indianapolis from 2008 to 2015. He is board certified in general and paediatric surgery by the American Board of Surgery. He then worked for four years at Dartmouth Hitchcock in New Hampshire as a paediatric surgeon and paediatric medical trauma director (2015 to 2019) prior to joining SickKids as Surgeon Scientist. Reto Baertschiger is an active member of the Children’s Oncology Group and several committees of the American Pediatric Surgical Association and American Academy of Pediatrics.


Dr. Baertschiger was appointed as a Scientist Track Investigator in the Genetics & Genome Biology Program at the SickKids Research Institute. He started his lab under the mentorship of Dr. David Malkin, and studies the micro-environment of paediatric liver tumors and the interaction of the native liver, its stroma and the tumor environment. 

Education and experience

  • 1995–2001:MD, Swiss Federal Diploma of Medicine, Medical School, University of Lausanne, Switzerland (6.5 year program)
  • 2003–2008: MD, PhD program, Cell Transplantation Laboratory, Unit of Surgical Investigations, Department of Surgery, Medical Faculty and Faculty of Sciences, University of Geneva, Geneva Switzerland, Prof L. Buhler and Prof Ph. Morel. PhD Thesis entitled “Human Multipotent mesenchymal stromal cells and their potential to differentiate into hepatocytes and beta cells”. 
  • 2008–2013: Residency in General Surgery. Dept. of Surgery, Indiana University School of Medicine, Indianapolis, IN, directed by Dr K.J. Lillemoe, Dr G. Dunnington and Dr. D. Canal
  • 2013–2015: Fellowship in Pediatric Surgery. Riley Hospital for Children, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, directed by Dr F. Rescorla
  • 2015–2019: Staff Pediatric Surgeon, Assistant Professor of Surgery, Pediatric Trauma Medical Director, Children’s Hospital at Dartmouth, Dartmouth Hitchcock Medical Center, Geisel School of Medicine, Lebanon and New Hampshire, USA
  • 2019–Present: Staff Surgeon, Assistant Professor of Surgery and Surgeon Scientist Track Investigator, SickKids and University of Toronto


  • 2015: Member of the Alpha Omega Alpha Honor Medical Society, indiana
  • 2019: Member of the Arnold P. Gold Foundation for Humanism in Medicine, Dartmouth


  1. Beaulieu-Jones BR, Croitoru DP, Baertschiger RM. Advanced providers in pediatric surgery: Evaluation of role and perceived impact.J Pediatr Surg. 2019 Jul 15. 
  2. Esbenshade AJ, Kahalley LS, Baertschiger R, Dasgupta R, Goldsmith KC, Nathan PC, Harker-Murray P, Kitko CL, Kolb EA, Murphy ES, Muscal JA, Pierson CR, Reed D, Schore R, Unguru Y, Venkatramani R, Wistinghausen B, Dhall G. Mentors' perspectives on the successes and challenges of mentoring in the COG Young Investigator mentorship program: A report from the Children's Oncology Group. Pediatr Blood Cancer. 2019 Oct;66(10):e27920.  
  3. Corkum KS, Rhee DS, Wafford QE, Demeestere I, Dasgupta R, Baertschiger R, Malek MM, Aldrink JH, Heaton TE, Weil BR, Madonna MB, Lautz TB. Fertility and hormone preservation and restoration for female children and adolescents receiving gonadotoxic cancer treatments: A systematic review. Pediatr Surg. 2019 Nov;54(11):2200-2209.  
  4. Newman EA, Abdessalam S, Aldrink JH, Austin M, Heaton TE, Bruny J, Ehrlich P, Dasgupta R, Baertschiger RM, Lautz TB, Rhee DS, Langham MR Jr, Malek MM, Meyers RL, Nathan JD, Weil BR, Polites S, Madonna MB; APSA Cancer committee. Update on neuroblastoma. Pediatr Surg. 2019 Mar;54(3):383-389. 
  5. Aldrink JH, Heaton TE, Dasgupta R, Lautz TB, Malek MM, Abdessalam SF, Weil BR, Rhee DS, Baertschiger R, Ehrlich PF; American Pediatric Surgical Association Cancer Committee. Update on Wilms tumor. Pediatr Surg. 2019 Mar;54(3):390-397.
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