John Scott Dunbar (1921 – 1997) was a Canadian radiologist

He is renowned for his many contributions to the field of paediatric radiology, as well as for his legacy as a lifelong educator, lecturer and author. He played a significant role in the training of radiologists in Canada, and aided in developing the regulations by which training requirements were governed in the late 20th century.

Dunbar’s radiological fields of interest included paediatric respiratory and genito-urinary systems, to which he contributed copious research papers. While not eponymous, he is accredited with first describing the ‘Toddler’s fracture’ (1964) – in his words a common, obscure fracture of the tibia in children difficult to identify both clinically and radiologically.

  • Born in 1921 in Barrie, Canada (possibly August 16, 1920)
  • 1945 – MD from the University of Toronto school of medicine
  • 1945-1948 rotating internship at the Toronto General Hospital, with surgical internship at the Queen Mary Veterans’ Hospital in Montreal.
  • 1952 – Certified Radiologist by the Royal College of Physicians and Surgeons of Canada and by the American Board of Radiology.
  • 1953 – Director of the Department of Radiology of the Montreal Children’s Hospital
  • 1956 – Fellowship in medicine from the Royal College of Physicians and Surgeons of Canada (FRCP)
  • 1959 – officer of the Association of Radiologists of the Province of Quebec
  • 1960 – Chairman of the Editorial Board and Chief Editor of the Journal of the Canadian association of radiologists
  • 1963 – Associate Professor of Radiology, Faculty of Medicine at McGill University
  • 1964 – Associate Overseas Editor of the British Journal of Radiology.
  • 1966 – Chairman of the Executive Council of the American Roentgen Ray Society
  • 1968 – Chairman of the Medical Board of the Montreal Children’s Hospital; Professor and Chairman of the Department of Radiology McGill University
  • 1969 – Caldwell lecturer
  • 1993ARRS Gold Medal
  • Died on November 20, 1997

Medical Eponyms

Toddler’s fracture

Major Publications



Eponymous terms

Josh Taylor, MD University of Western Australia. Medical training in Western Australia with a keen interest in Ophthalmology.

BA MA (Oxon) MBChB (Edin) FACEM FFSEM. Emergency physician, Sir Charles Gairdner Hospital.  Passion for rugby; medical history; medical education; and asynchronous learning #FOAMed evangelist. Co-founder and CTO of Life in the Fast lane | Eponyms | Books | Twitter |

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