University Health Network (UHN)

Allan Okrainec , MDCM, MHPE, FACS, FRCSC
Division Head, General Surgery
University Health Network, Toronto
The Division of General Surgery at University Health Network is comprised of 22 General Surgeons distributed at 3 hospital sites: Toronto General Hospital, Toronto Western Hospital, and Princess Margaret Hospital.  Each faculty member has a minimum of specialty certification in General Surgery from the Royal College of Physicians and Surgeons of Canada plus additional subspecialty training in one or more areas of expertise and interests. 

The foci of our Division are on General Surgical Oncology, Solid Organ Transplantation, and Minimally Invasive Surgery.  Expertise in programs tend to be site based, but there is significant overlap between the individual sites. 

Priorities at the Toronto General Hospital include Hepatobiliary Pancreatic Surgery, (including the laparoscopic approach to tumours of the Liver Biliary tree and Pancreas), Colorectal and Gastrointestinal Oncology, Surgery on Endocrine Diseases, Solid Organ Transplantation, and Advanced Minimally Invasive Surgery.

At Princess Margaret Hospital, priority programs include Treatment of Diseases of the Breast, Melanoma and other Skin Malignancies, and Management of Tumours of the Endocrine System. 

The focus at the Toronto Western Hospital is on Minimally Invasive Surgery including Surgical Treatment of Morbid Obesity (Bariatric Surgery).

Members of our Division are amongst the leaders in the World in their areas of expertise and carry on extensive research and educational programs.  Our research interests include GI Cancer Genetics, the Role of Stem Cells in Colorectal Cancer, Surgical Quality and Outcomes, Solid Organ Transplant Immunology, Surgical Education, including the Use of Simulators in Surgical Training.

Our Vision:
Achieving global impact.

Our Mission:
Exemplary patient care, research, and education.

Our Purpose:
We are caring, creative, and accountable academic hospital transforming healthcare for our patients, our community, and the world.

Our Values:
Caring, excellence, teamwork, innovation, integrity, leadership, and respect.
Providing care to the community for more than 200 years, University Health Network is a major landmark in Canada’s Healthcare system and a University of Toronto Affiliated Teaching Hospital.  Building on the strengths and reputation of each of our three sites, UHN brings together the talent and the resources needed to achieve global impact and provide exemplary patient care, research, and education.   Every year we perform over 300 solid organ transplants, 2,500 surgeries as well as see more than 5,000 new patients in our Ambulatory Care Clinics across our three hospitals.

In addition to undergraduate and postgraduate resident teaching responsibilities, our faculty is actively involved in the supervision of postgraduate students in Medical Education, Clinical Epidemiology, Transplantation Immunology, Advanced Minimally Invasive Surgery, Surgical Oncology, Hepatobiliary and Pancreatic Surgery, and Colorectal Surgery.


Mark Cattral, Prof.
Tulin Cil, Asst. Prof.
Sean Cleary, Asst. Prof.
Jaime Escallon, Assoc. Prof.
Steven Gallinger, Prof.
Anand Ghanekar, Asst. Prof.
David Grant, Prof.
Paul Greig, Prof.
Timothy Jackson, Asst. Prof.
Erin Kennedy, Asst. Prof.
Wey Leong, Asst. Prof.
David McCready, Prof.
Ian McGilvray, Asst. Prof.
Carol-Anne Moulton, Asst. Prof.
Allan Okrainec, Asst. Prof.
Catherine O'Brien, Asst. Prof.
Todd Penner, Lecturer
Fayez Quereshy, Asst. Prof.
Michael Reedijk, Asst. Prof.
Richard Reznick, Prof.
Lorne Rotstein, Prof.
Markus Selzner, Asst. Prof.
Bryce Taylor, Prof.
David Urbach, Assoc. Prof.
Alice Wei, Asst. Prof.