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About Sickkids
About SickKids

Yaron Avitzur , MD

The Hospital for Sick Children
Medical Director, Intestinal Rehabilitation and Transplantation
Gastroenterology, Hepatology and Nutrition

Director, Paediatric Gastroenterology Training Program
Gastroenterology, Hepatology and Nutrition

Staff Gastroenterologist
Gastroenterology, Hepatology and Nutrition

University of Toronto
Associate Professor

Phone: 416-813-6176
Fax: 416-813-6531
Email: yaron.avitzur@sickkids.ca
Alternate Contact: Sherry Joy
Alternate Email: sherry.joy@sickkids.ca

Brief Biography

Dr. Yaron Avitzur is the Medical Director of Intestinal Rehabilitation and Transplantation in the Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children and the Medical Director, joint program in Intestinal Transplantation, University Health network and Hospital for Sick Children, Toronto. Dr. Avitzur graduated in medicine from Sackler Faculty of Medicine at Tel-Aviv University, Israel in 1995. He completed his Paediatric residency in Schneider Children’s Medical Center of Israel and was licensed as a Pediatric Gastroenterologist in 2005 after a dual fellowship in Pediatric Gastroenterology and Pediatric Academic Multi-Organ Transplantation (PAMOT) at The Hospital for Sick Children, Toronto.

Upon the completion of his fellowship he returned to Israel and joined the Institute of Gastroenterology, Nutrition and Liver Diseases at Schneider Children’s Medical Center of Israel as a senior Pediatric Gastroenterologist. While in Israel he led the establishment of the first pediatric small bowel transplantation program in Israel. Dr. Avitzur joined the Division of Gastroenterology, Hepatology and Nutrition in SickKids as a staff Gastroenterologist in 2009. He was appointed as the Division’s Training Program Director in 2014.
His areas of specialty and clinical activity include paediatric liver and intestinal transplantation, intestinal failure and rehabilitation and congenital diarrheas.

Research Interests

Dr. Avitzur’s research interest and activity aligns with his clinical interest and focus on short and long term outcome after pediatric liver and small bowel transplantation and on intestinal failure. More recently Dr. Avitzur is studying the immunological and clinical aspects of allergies and autoimmune diseases in pediatric recipients of liver transplantation through multi-center collaborations and translational research with the Division of Immunology at SickKids.

Within the field of intestinal failure Dr. Avitzur is studying the clinical aspects of intestinal failure and rehabilitation with a specific focus on the impact of intestinal rehabilitation on intestinal transplant candidates and intestine transplantation listing criteria and on genotype-phenotype characterization of rare congenital diarrheas. 


For a complete list of publications please see PubMed.

Eosinophilic esophagitis after organ transplantation and post-transplant lymphoproliferative disorder: More questions than answers. (2014) Allen U, Avitzur Y. Pediatric Transplantation. 18(7):665-667.

Predicting outcomes for children awaiting liver transplantation: is serum sodium the answer? (2014) Ling SC, Avitzur Y. Hepatology. 59(5):1678-1680.

Mutations in tetratricopeptide repeat domain 7A result in a severe form of very early onset inflammatory bowel disease. (2014) Avitzur Y, Guo C, Mastropaolo LA, Bahrami E, Chen H, Zhao Z, Elkadri A, Dhillon S, Murchie R, Fattouh R, Huynh H, Walker JL, Wales PW, Cutz E, Kakuta Y, Dudley J, Kammermeier J, Powrie F, Shah N, Walz C, Nathrath M, Kotlarz D, Puchaka J, Krieger JR, Racek T, Kirchner T, Walters TD, Brumell JH, Griffiths AM, Rezaei N, Rashtian P, Najafi M, Monajemzadeh M, Pelsue S, McGovern DP, Uhlig HH, Schadt E, Klein C, Snapper SB, Muise AM. Gastroenterology. 146(4):1028-1039.

A CARD9 polymorphism is associated with decreased likelihood of persistent conjugated hyperbilirubinemia in intestinal failure. (2014) Burghardt KM, Avinashi V, Kosar C, Xu W, Wales PW, Avitzur Y, Muise A. PLoS One. 9(1):e85915.

From diarrhea to obesity in prohormone convertase 1/3 deficiency: age-dependent clinical, pathologic, and enteroendocrine characteristics. (2013) Bandsma RH, Sokollik C, Chami R, Cutz E, Brubaker PL, Hamilton JK, Perlman K, Zlotkin S, Sigalet DL, Sherman PM, Martin MG, Avitzur Y.
Journal of Clinical Gastroenterology. 47(10):834-843.

Congenital proprotein convertase 1/3 deficiency causes malabsorptive diarrhea and other endocrinopathies in a pediatric cohort. (2013) Martín MG, Lindberg I, Solorzano-Vargas RS, Wang J, Avitzur Y, Bandsma R, Sokollik C, Lawrence S, Pickett LA, Chen Z, Egritas O, Dalgic B, Albornoz V, de Ridder L, Hulst J, Gok F, Aydoğan A, Al-Hussaini A, Gok DE, Yourshaw M, Wu SV, Cortina G, Stanford S, Georgia S. Gastroenterology. 145(1):138-148.

Delayed primary serial transverse enteroplasty as a novel management strategy for infants with congenital ultra-short bowel syndrome. (2013) Wales PW, Jancelewicz T, Romao RL, Piper HG, de Silva NT, Avitzur Y. Journal of Pediatric Surgery. 48(5):993-999.

Infliximab as salvage therapy in paediatric intestinal transplant with steroid- and thymoglobulin-resistant late acute rejection. (2012) De Greef E, Avitzur Y, Grant D, De-Angelis M, Ng V, Jones N, Ngan B, Shapiro R, Steinberg R, Gana JC. Journal of Pediatric Gastroenterology and Nutrition. 54(4):565-567.

Ethanol lock therapy to reduce the incidence of catheter-related bloodstream infections in home parenteral nutrition patients with intestinal failure: preliminary experience. (2011) Wales PW, Kosar C, Carricato M, de Silva N, Lang K, Avitzur Y. Journal of Pediatric Surgery. 46(5):951-956.

BK virus infection and its effect on renal function in pediatric liver-transplant recipients: a cross-sectional, longitudinal, prospective study. (2011) Amir A, Shapiro R, Shulman LM, Mor E, Steinberg R, Fleishhacker H, Bergerin R, Avitzur Y. Transplantation. 92(8):943-946.

Adrenal insufficiency during physiological stress in children after kidney or liver transplantation. (2011) Bilavsky E, Dagan A, Yarden-Bilavsky H, Davidovits M, Shapiro R, Mor E, Weintrob N, Amir J, Avitzur Y. Pediatric Transplantation. 15(3):314-320.

The efficacy and safety of valganciclovir vs. oral ganciclovir in the prevention of symptomatic CMV infection in children after solid organ transplantation. (2010) Lapidus-Krol E, Shapiro R, Amir J, Davidovits M, Steinberg R, Mor E, Avitzur Y. Pediatric Transplantation. 14(6):753-760.

Intestine transplantation in children: update 2010. (2010) Avitzur Y, Grant D. Pediatric Clinics of North America. 57(2):415-431.

Prospective evaluation of the prevalence and clinical significance of positive autoantibodies after pediatric liver transplantation. (2007) Avitzur Y, Ngan BY, Lao M, Fecteau A, Ng VL.
Journal of Pediatric Gastroenterology and Nutrition. 45(2):222-227.

Health status ten years after pediatric liver transplantation--looking beyond the graft. (2004) Avitzur Y, De Luca E, Cantos M, Jimenez-Rivera C, Jones N, Fecteau A, Grant D, Ng VL. Transplantation. 78(4):566-573.

Interstitial granulomatous pneumonitis associated with sirolimus in a child after liver transplantation. (2003) Avitzur Y, Jimenez-Rivera C, Fecteau A, Jones N, Ngan BY, Ng VL. Journal of Pediatric Gastroenterology and Nutrition. 37(1):91-94.