Margaret (Peggy) Marcon

Dr. Peggy Marcon is a paediatric gastroenterologist. She graduated from McNeese State University in Louisiana, attended medical school at Louisiana State University, Shreveport, undertook her paediatric residency at the University of Texas Southwestern, and then completed a fellowship in Paediatric Gastroenterology at SickKids.

Once on staff she set up the Gastrointestinal Motility Testing Suite.  With her interest in gastrointestinal motility she oversees the Motility Clinic as well as co runs the Aerodigestive Clinic (with Respirology and Surgery) and the Eosinophilic Esophagitis Clinic with Dr. Jessie Hulst.

Her other clinical and research interest is Celiac Disease and she runs the Celiac Clinic with Dr. Catharine Walsh. She collaborates with Endocrinology to study children with Celiac Disease and Type 1 Diabetes.

Research

Marcon’s research interests follow her areas of clinical interest and expertise. In general the clinical studies have evolved from groups of patients seen in the Motility Clinic, especially those with swallowing disorders. This includes esophageal motility problems, such as Achalasia and Eosinophilic Esophagitis As a member of Aerodigestive Clinics they are looking at long term outcomes, burden of care and morbidity.

Dr. Marcon also has an interest in Celiac Disease and have collaboration with Paediatric Endocrinology. They have a large multi-center study looking at dual diagnosis – Celiac Disease and Type 1 Diabetes, and the effect of gluten free diet.

Education and experience

• 2011–Present: Associate Professor, University of Toronto, Toronto, ON
• 1989–Present: Paediatric Gastroenterologist, The Hospital for Sick Children, Toronto, ON
• 2005–Present: Project Investigator, Research Institute, The Hospital for Sick Children, Toronto, ON
• 1986–1989: Subspecialty Fellow, Paediatric Gastroenterology, The Hospital for Sick Children, University of Toronto, Toronto, ON
• 1983–1986: Resident, Paediatrics, Children’s Medical Centre, University of Texas Southwestern Health Science Centre, Dallas, TX
• 1983–1986: MD, Louisiana State University, Shreveport, LA
• 1979: B.Sc., McNeese State University, Lake Charles, LA, Magna Cum Laude

1. Mahmud FH, Clarke ABM, Joachim KC, et al.  Screening and Treatment Outcomes in Adults and  Children With Type 1 Diabetes and Asymptomatic Celiac Disease: The CD-DIET Study.  DiabetesCare. 2020;43(7):1553-1556.
2. Connan V, Marcon MA, Mahmud FH, et al. Online education for gluten-free diet teaching: Development and usability testing of an e-learning module for children with concurrent celiac disease and type 1 diabetes. Pediatr Diabetes. 2019;20(3):293-303. 
3. Gould MJ, Brill H, Marcon MA, Munn NJ, Walsh CM. In Screening for Celiac Disease, Deamidated Gliadin Rarely Predicts Disease When Tissue Transglutaminase Is Normal. J Pediatr Gastroenterol Nutr. 2019;68(1):20-25.
4. Gallagher K, Flint A, Mouzaki M, et al. Blenderized Enteral Nutrition Diet Study: Feasibility, Clinical, and Microbiome Outcomes of Providing Blenderized Feeds Through a Gastric Tube in a Medically Complex Pediatric Population. JPEN J Parenter Enteral Nutr. 2018;42(6):1046-1060.
5. Mawlana W, Zamiara P, Lane H, et al. Neurodevelopmental outcomes of infants with esophageal atresia and tracheoesophageal fistula. J Pediatr Surg. 2018;53(9):1651-1654.