Dr. Kellar completed her MD at the University of Calgary, receiving the Nat Christie Medical Entrance Scholarship, appointed to the Leaders in Medicine program for physicians pursuing academic medicine. She completed her Pediatric residency at the Hospital for Sick Children and her Pediatric Gastroenterology fellowship at the University of Calgary. She went on to complete an advanced fellowship in adult IBD and an additional year of advanced IBD fellowship at Mount Sinai Hospital in NY with specialized training in intestinal ultrasound. Dr. Kellar has made several significant contributions to the field of IBD research. Among her accomplishments are her 1st author publication of the first ever guideline outlining the use of intestinal ultrasound for the Pediatric Gastroenterologists. She is also 1st author on the first pediatric activity ultrasound score (SPAUSS) for accurate detection of pediatric inflammatory bowel disease. Her research was highlighted at Advances in IBD, the European Crohn’s and Colitis Organization (ECCO) Congress, as well as Digestive Disease Week (DDW). She received the Canadian Association of Gastroenterology (CAG) Resident Research Award and the Alberta Medical Association (AMA) Pediatric Section Grant for her research endeavours.
Dr. Kellar is one of few certified intestinal ultrasonographers and trainers with the International Bowel Ultrasound Group (IBUS) and was appointed to the Pediatric Committee for IBUS. She is the Chair of Research for iUSCAN (the North American subdivision of IBUS). She is the Director of Pediatric IUS, and Co-Director of the Pediatric IBD Program and is cross-appointed to both Pediatric and Adult Gastroenterology at the University of Chicago. Her research interests include intestinal ultrasound, novel and dual advanced therapies and clinical trials.
Icahn School of Medicine at Mount Sinai
New York (USA)
- Pediatric Inflammatory Bowel Disease Fellowship
2023
University of Calgary
Calgary, AB (Canada)
- Adult Inflammatory Bowel Disease Fellowship
2022
University of Calgary
Calgary, AB (Canada)
FRCPC - Pediatric Gastroenterology Fellowship
2021
University of Toronto, Hospital for Sick Children
Toronto, ON (Canada)
FRCPC - Pediatric Residency
2019
University of Calgary
Calgary, AB (Canada)
MD - Medicine
2016
Queen's University
Kingston, ON (Canada)
MSc - Pathology & Molecular Medicine
2009
Queen's University
Kingston, ON (Canada)
BScH - Biology, minor Psychology
2007
Incidence and Risk Factors for Development of Acne (JAKne) in Patients with Inflammatory Bowel Disease Treated With Upadacitinib.
Incidence and Risk Factors for Development of Acne (JAKne) in Patients with Inflammatory Bowel Disease Treated With Upadacitinib. Inflamm Bowel Dis. 2025 Aug 01; 31(8):2311-2314.
PMID: 40411447
The EXTENT Study: Results From an International Expert Delphi Consensus to Define Ultrasonographic Parameters for Measuring Bowel Damage in Crohn's Disease.
The EXTENT Study: Results From an International Expert Delphi Consensus to Define Ultrasonographic Parameters for Measuring Bowel Damage in Crohn's Disease. Clin Gastroenterol Hepatol. 2025 Jul 28.
PMID: 40738277
Sonographic Transmural Induction Outcomes Across Advanced Therapies in Crohn's Disease.
Sonographic Transmural Induction Outcomes Across Advanced Therapies in Crohn's Disease. Dig Dis Sci. 2025 Nov; 70(11):3912-3921.
PMID: 40618289
ECCO-ESGAR-ESP-IBUS Guideline on Diagnostics and Monitoring of Patients with Inflammatory Bowel Disease: Part 1.
ECCO-ESGAR-ESP-IBUS Guideline on Diagnostics and Monitoring of Patients with Inflammatory Bowel Disease: Part 1. J Crohns Colitis. 2025 Jul 03; 19(7).
PMID: 40741688
ECCO-ESGAR-ESP-IBUS Guideline on Diagnostics and Monitoring of Patients with Inflammatory Bowel Disease: Part 2.
ECCO-ESGAR-ESP-IBUS Guideline on Diagnostics and Monitoring of Patients with Inflammatory Bowel Disease: Part 2. J Crohns Colitis. 2025 Jul 03; 19(7).
PMID: 40742985
Defining normal bowel wall thickness in children with inflammatory bowel disease in deep remission: A multicenter study on behalf of the pediatric committee of the International Bowel Ultrasound Group (IBUS).
Defining normal bowel wall thickness in children with inflammatory bowel disease in deep remission: A multicenter study on behalf of the pediatric committee of the International Bowel Ultrasound Group (IBUS). J Pediatr Gastroenterol Nutr. 2025 Jul; 81(1):53-61.
PMID: 40296563
Hermansky-Pudlak Syndrome Complicated by Crohn's Disease and Hidradenitis Suppurativa: A Case of Multisystem Immune Dysregulation.
Hermansky-Pudlak Syndrome Complicated by Crohn's Disease and Hidradenitis Suppurativa: A Case of Multisystem Immune Dysregulation. ACG Case Rep J. 2025 Apr; 12(4):e01647.
PMID: 40165941
Single-center Experience With Upadacitinib for Adolescents With Refractory Inflammatory Bowel Disease.
Single-center Experience With Upadacitinib for Adolescents With Refractory Inflammatory Bowel Disease. Inflamm Bowel Dis. 2024 11 04; 30(11):2057-2063.
PMID: 38134405
Early Intestinal Ultrasound Response to Biologic Therapy Predicts Endoscopic Remission in Children with Ileal Crohn's Disease: Results from the Prospective Super Sonic Study.
Early Intestinal Ultrasound Response to Biologic Therapy Predicts Endoscopic Remission in Children with Ileal Crohn's Disease: Results from the Prospective Super Sonic Study. J Crohns Colitis. 2024 Aug 06; 18(7):1002-1011.
PMID: 38141229
Real-World Outcomes of Dual Advanced Therapy in Children and Young Adults with Inflammatory Bowel Disease.
Real-World Outcomes of Dual Advanced Therapy in Children and Young Adults with Inflammatory Bowel Disease. Dig Dis Sci. 2024 May; 69(5):1826-1833.
PMID: 38521850
Marguerite Herschel Awards for Clinical Excellence
University of Chicago
2024
AIBD Fellow Travel Grant
Advances in Inflammatory Bowel Disease
2023 - 2023
CANADIAN ASSOCIATION OF GASTROENTEROLOGY RESIDENT RESEARCH AWARD
CAG
2020 - 2021
ALBERTA MEDICAL ASSOCIATION PAEDIATRIC SECTION GRANT
Alberta Medical Association
2020 - 2021
PAEDIATRIC RESEARCH AWARD
Hospital for Sick Children
2017 - 2017
DR. KEN BUCHAN MEMORIAL AWARD
University of Calgary
2015 - 2016
NAT CHRISTIE FOUNDATION MEDICAL ENTRANCE AWARD
University of Calgary
2013 - 2016