High Risk Breast Screening Program

Young woman getting a mammogram

High-Risk Breast Cancer Screening at a Glance

Ontario Breast Screening Program (OBSP)

Women aged 30 to 69 who have been confirmed to be at high-risk for breast cancer based on the following criteria: 

  • Are known to be carriers of a deleterious gene mutation (e.g. BRCA1, BRCA2)
  • Are the first degree relative of a mutation carrier (e.g. BRCA1, BRCA2) and have declined genetic testing
  • Are determined to be (less than or equal to) 25 per cent lifetime risk of breast cancer - must have been assessed using either the IBIS or BOADICA risk assessment tools, preferably at a genetics clinic.
  • Have received chest radiation before age 30 and at least eight years previously  

Annually or determined by healthcare team.

There is evidence that annual screening with breast magnetic resonance imaging (MRI) in addition to mammography (MM) benefits women at high-risk. The introduction of combined MM/MRI screening into the OBSP for women aged 30-69 who are at high-risk for breast cancer will improve their quality of care, ensuring they receive the benefits of screening and promoting the early detection of breast cancer. 

Resources and Information 

OBSP High-Risk Screening Sites in the South West:

South West Regional Cancer Program (St. Joseph's Health Care London)
Phone: 1800.461.0640 
Fax: 519.432.0271

Grey Bruce Health Services
Phone: 519.376.2121 ext. 2116
Fax: 519.372.3954

Genetic Testing Contact Information

Cancer Genetics Program 
London Health Sciences Centre
Phone: 519.685.8727 
Fax: 519.685.8005

A doctor can refer patients with or without cancer, who are considered to be at-risk for an inherited cancer to the Cancer Genetics Clinic by calling or faxing your request. Office hours are 8:00 am - 4:00 pm, Monday to Friday.