Faculty profile

Ronald Duncan Barr

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Professor EmeritusPediatricsMcMaster University

Research

Following training in Internal Medicine and Haematology, Dr. Barr joined the team from the University of Glasgow charged with helping the University of Nairobi to establish a Faculty of Medicine. As there were no pediatricians trained in the local care of children with blood diseases and cancer at that time (1970), he joined two colleagues from McGill in providing this clinical service at the Kenyatta National Hospital. So began a 50 year odyssey in pediatric hematology and oncology, interrupted by an opportunity to be fully focused on basic research at the National Cancer Institute (NCI) in the US which allowed him to complete his doctoral thesis on Human Haematopoietic Homeostasis. Within a year of returning to Scotland Dr. Barr received an invitation to visit the Department of Pediatrics at McMaster by its first Chair, Dr. Alvin Zipursky, during the infamous winter of 1977. This led to him emigrating with his family and joining the Faculty in September of that year. Dr. Barr was the Director of the Division of Hematology and Oncology from its establishment in 1981 until 2008. Consistent with his training in Internal Medicine his interest expanded to include adolescents and young adults (AYAs) with cancer, an area under development in the newly formed Children’s Oncology Group in 2000 under the leadership of Dr. Archie Bleyer. In 2005 Dr. Barr accepted the invitation from Dr. Bleyer to be the only Canadian in the initiative of the NCI to form a new discipline – AYA oncology – in North America. This provided the impetus to establish, in 2008, a national task force in Canada, headquartered at McMaster and funded by the then recently formed Canadian Partnership Against Cancer. Meanwhile phase 3 of “career development” was underway – responding to the challenges of caring for children with cancer in low- and middle- income countries (LMICs) – a commitment which Dr. Barr began in 1993 as a member of the Current Treatment Committee of the International Union Against Cancer, a position he held until 2002, with an initial focus on the countries of Central America. The early recognition of malnutrition as an important limiting factor in efforts to improve the survival of these children has driven research in such populations in LMICs and the emergence, at Columbia University Medical Center in New York, of the International Initiative in Pediatrics and Nutrition, to which Dr. Barr was appointed Associate Director in February 2021. Recognition of his accomplishments led to the award of the O. Harold Warwick Prize for Cancer Control Research from the Canadian Cancer society in 2009 and the Paediatric Academic Leadership Clinical Practitioner Award from the Paediatric Chairs of Canada in 2014. In November 2020 Dr. Barr was appointed to the Order of Canada.

Research areas, by share of publications

Research areas are derived from OpenAlex topics of their publications.

From the 150 most recent of 689 publications.

01

Central Adiposity and Visceral Fat in Long‐Term Survivors of Acute Lymphoblastic Leukemia in Childhood and Adolescence: Exploration of an Underappreciated Risk

Guolla L, Chou A, Farncombe TH, Thabane L, Morrison K, Barr RD

Pediatric Blood and Cancer20261 citationsSenior author
02

Role of the perinatal experience on the risk of acute leukemia in childhood or adolescence: Systematic review and meta‐analysis

Blanco‐Lopez J, Kintossou AK, Manohar S, Iguacel I, Pisanu S, Almeida CCB, Steliarova‐Foucher E, Sierens C, Gunter MJ, Ladas EJ

International Journal of Cancer2026
03

Time to diagnosis among children and adolescents with cancer in Quebec, Canada: a population-based study

Mullen C, Barr RD, Strumpf E, El-Zein M, Franco EL, Malagón T

2026
04

Time to Diagnosis Among Children and Adolescents With Cancer in Québec, Canada: A Population‐Based Study

Mullen C, Barr RD, Strumpf E, El‐Zein M, Franco EL, Malagón T

Pediatric Blood and Cancer2026
05

Impact of Adolescent and Young Adult Cancer Expertise in Oncologists on AYA Outcomes in Hodgkin Lymphoma: A Population‐Based Study in Ontario, Canada

Andrew EC, Lau C, Rae C, Barr RD, Nathan PC, Gupta S

Cancer Medicine2026
06

Colon, colorectal, and all cancer incidence increase in the young due to appendix reclassification

Bleyer A, Ries LAG, Cameron DB, Mansfield SA, Siegel SE, Barr RD

Journal of the National Cancer Institute202534 citationsSenior author
07

Nutritional status, body composition and chemotherapy dosing in children and young people with cancer: a systematic review by the SIOP nutrition network

Lovell AL, Makamo N, Veal GJ, Bernhardt MB, Barr R, Gala RM, Gordon E, Ladas EJ, Prasad M, Rogers PC

British Journal of Cancer202513 citations
08

Hypoalbuminemia and Nutritional Status in Children With Cancer

McLean TW, Shah NS, Barr RD, Tooze JA

Pediatric Blood and Cancer20259 citations
09

Effective nutritional intervention improves the health-related quality of life (HRQL) of undernourished children with cancer: results of a randomized, controlled phase 3 trial

Prasad M, Goswami S, Chinnaswamy G, Ladas EJ, Barr RD

Supportive Care in Cancer20253 citationsSenior author
10

Response to Siegel, Kratzer, Smith et al.

Bleyer A, Ries LAG, Cameron DB, Mansfield SA, Siegel SE, Barr RD

Journal of the National Cancer Institute20252 citationsSenior author

Roles and appointments

  • Member, Pediatric Oncology Group of Ontario (1983 - 2020)
  • President, Pediatric Oncology Group of Ontario (2000 - 2014)
  • Member, Current Treatment Committee, International Union Against Cancer (1993 - 2002)
  • Co-Chair, Management Committee, Canadian Children's Cancer Surveillance and Control Programme (1998 - 2008)
  • Member, Governing Council, International Network for Cancer Treatment and Research (2000 - 2010)
  • Member, Advisory Board, Institute of Cancer Research, CIHR (2004 - 2010)
  • Member, Progress Review Group on Adolescent and Young Adult Cancer, National Cancer Institute, NIH
  • Co-chair, National Task Force on Adolescent and Young Adult Cancer, Canadian Partnership Against Cancer (2008 - 2016)
  • Chair, Working Group on Essential Medicines, International Society for Paediatric Oncology (2010 - 2015)
  • Member, Essential Medicines Working Group on New Cancer Medicines, World Health Organisation (2014 - 2015)
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Applying for
Subject: Prospective PhD student: Childhood Cancer Survivors' Quality of Life Dear Professor Barr, My name is [your name], and I am a [your current degree or role] at [your institution]. I am applying for a PhD position starting in [term and year]. I read your paper "Central Adiposity and Visceral Fat in Long‐Term Survivors of Acute Lymphoblastic Leukemia in Childhood and Adolescence: Exploration of an Underappreciated Risk" (2026), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] Are you accepting new PhD students for [term and year]? I have attached my CV and transcripts, and I would be glad to talk at a time that suits you. Thank you for your time. Kind regards, [your name]
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