About Us

Who We Are & What We Do

At UHN’s Colorectal Cancer Program, we are sub-specialty trained surgical oncologists and colorectal surgeons, licensed by the Royal College of Surgeons of Canada, and by the American College of Surgeons. In addition, our surgeons have done additional sub-specialty (“fellowship”) training in Complex Surgical Oncology or Colorectal Surgery. We are interested in both common and complex cases of colorectal cancer.

Our specialty training has allowed us to offer services that may not be available at other hospitals, such as:

[info_list_father connector_h=”10″ listwidth=”0″][info_list_son width=”35″ height=”35″ titleclr=”#000000″ image_id=”5104″]Sphincter preserving surgery[/info_list_son][info_list_son width=”35″ height=”35″ titleclr=”#000000″ image_id=”5099″]Avoidance of permanent colostomy[/info_list_son][info_list_son width=”35″ height=”35″ titleclr=”#000000″ image_id=”5100″]Surgical assessment of cancers presumed to be “unresectable” or “inoperable”[/info_list_son][info_list_son width=”35″ height=”35″ titleclr=”#000000″ image_id=”5101″]Surgery for patients with many health problems[/info_list_son][/info_list_father]

We are happy to offer first or second (or third, fourth, fifth, etc.) opinions on any case of colorectal cancer, so please reach out to us if you need us.

Meet Our Team

Nurse Navigator

The Nurse Navigator acts as a single point of contact for new patients and family members, ensuring consistency of care and coordination of appointments.  As well, the Nurse Navigator has clinical expertise in oncology and provides guidance, education, and emotional support to patients during the diagnostic phase of treatment.


Dr. Sami Chadi

Administrative Assistant:
Rachel Needham
Tel: 416-603-6769
Fax: 416-603-5936

Dr. Fayez Quereshy

Administrative Assistant:
Arlene Alburo
Tel: 416-603-5553
Fax: 416-603-5714

Dr. Catherine O’Brien

Administrative Assistant:
Debbie Craig
Tel: 416-340-4910
Fax: 416-340-3808

Interventional Endoscopist

Dr. Eran Shomovitz

Tel: 416-340-3287
Fax: 416-340-3808

Resident Research Fellow

Keegan Guidolin

Keegan Guidolin

View Bio