Nation

Remembering Dr. Sean Cleary: A Pioneer in Robotic Surgery and Beloved Mentor

2025-09-10

Author: Sophie

A Tragic Loss in the Medical Community

The world of medicine is mourning the untimely passing of Dr. Sean Cleary, a celebrated surgical oncologist known for his groundbreaking work in robotic surgery in Canada. Dr. Cleary tragically passed away on August 10, 2023, at the age of 52 during a triathlon in Barrie, Ontario.

A Master of Education and Inspiration

Friends and colleagues remember Dr. Cleary for his unique ability to educate while uplifting those around him. Dr. Adnan Alseidi, a close peer, recalled a time when Cleary offered constructive feedback on a surgery he conducted. Instead of feeling criticized, Alseidi felt inspired, highlighting Cleary's skill in fostering positivity and growth.

A Stellar Career in Oncology

Dr. Cleary garnered international acclaim in hepatopancreatobiliary (HPB) surgery, a specialized field treating conditions involving the pancreas, liver, and bile ducts. His credentials were extensive; he served as president of both the Canadian Association of General Surgeons and the Americas Hepato-Pancreato-Biliary Association, contributing to over 190 research papers.

A Return to Roots

After spending several years in the United States, Dr. Cleary returned to Toronto in 2023 to take on the Langer Chair at the University of Toronto. He was instrumental in developing one of Canada’s largest and most advanced robotic surgery programs, impacting countless surgeons and patients across multiple hospitals.

An Impact Beyond Medicine

To his patients, Dr. Cleary was not just a surgeon but a beacon of hope. George Emerson, one of his patients, shared how Cleary’s compassion and scientific insights provided relief during his challenging health battles, stating that Dr. Cleary gave him more time and care than he had ever received from any doctor.

A Legacy of Love and Learning

Born on November 1, 1972, in Toronto, Dr. Cleary showed signs of brilliance from a young age, excelling in academics and various talents like sports, music, and theatre. His sister, Lisa Reid, described him as a cherished brother, someone who could make anyone feel they were the center of his attention.

A Visionary in the Making

Dr. Cleary’s journey to becoming an acclaimed surgeon began at Queen’s University and culminated at Western University for his medical degree. He showed exceptional promise during his residency, quickly standing out among his peers and mentors for his insight and dedication.

Building a Future for Robotic Surgery

While at the Mayo Clinic in Minnesota, Dr. Cleary became adept at robotic surgery, an area in which Canada was lagging behind. He collaborated with colleagues to create a registry for minimally invasive liver procedures, an invaluable resource now considered the largest of its kind in the world.

A Call to Honor His Legacy

At a recent tribute held at the University Health Network, colleagues struggled with the profound loss of Cleary. Timothy Jackson, UHN's division head of general surgery, urged everyone to continue exemplifying Cleary's values of excellence, humility, and unwavering support for one another.

Remembering an Icon

Dr. Sean Cleary’s remarkable contributions to medicine and his impactful presence in the lives of others will never be forgotten. As the medical community reflects on his legacy, it becomes clear that his spirit of mentorship and care will continue to inspire generations of doctors and patients alike.