Mammograms

Mammograms are considered safe and use a low dose of radiation.

Getting screened with mammography during pregnancy or while lactating is safe and effective.

Potential Benefits of Regular Breast Cancer Screening

• Getting screened regularly can find breast cancer earlier which may mean that:
  • the chance of dying from breast cancer is lower
  • treatment has a better chance of working
  • fewer treatments may be required and the treatments may be less invasive (easier to handle)

Potential Harms of Regular Breast Cancer Screening

• False-positive: Getting an abnormal result when there is no cancer present. It can lead to extra testing, like a biopsy (taking a small sample of tissue), that can cause anxiety and stress for some people.
• False-negative: Missing a cancer on a screening mammogram, which could lead to delayed treatment.
• Overdiagnosis: Finding a cancer that would not otherwise cause health problems, that may lead to unneeded surgery or treatment.

You should book your mammogram for a time when your breasts are not tender. Your breasts may be tender:

• the week before and after your period
• if you have drinks with caffeine (like coffee, tea or other drinks high in caffeine)

Some experts say that having less caffeine for 2 weeks before your mammogram can help make your breasts less tender.

On the day of your mammogram:

• wear a 2-piece outfit (like a top and pants) because you will be asked to take off your top
• do not use deodorants, antiperspirants, body lotions or talcum powders because they can affect the accuracy of the mammogram

If you are planning to have a mammogram to check for breast cancer, you may be wondering what it will be like.

• A medical radiation technologist (someone who is trained to take mammograms) will place your breast on the mammography machine.
• A plastic plate will move down slowly to press the breast and hold it in place.
• There will be some pressure for a few seconds on the breast, much like a tight blood pressure cuff. This pressure does not harm your breast tissue. The person taking the mammogram is trained to make sure the experience is as comfortable as possible and will be able to adjust the pressure if needed.
• Mammograms are taken of each breast from 2 different angles.
• The appointment usually takes about 15 minutes.

Normal Results

If your mammography results are normal, the Ontario Breast Screening Program will notify your family doctor or nurse practitioner. The program will also send you a letter with your results and when to get screened again.

Abnormal Results

If you have an abnormal screening result, your Ontario Breast Screening Program location will notify your family doctor or nurse practitioner and may also help to schedule a timely follow-up appointment.

If you have an abnormal mammogram and do not have a family doctor or nurse practitioner, your screening location will assign you to a doctor or nurse practitioner who will follow you to diagnosis.

Most people with an abnormal mammogram do not have breast cancer. More tests are needed after an abnormal mammogram to find out whether a person has cancer. These tests may include more mammography, breast ultrasound, breast magnetic resonance imaging and/or biopsies.

If you are diagnosed with breast cancer, you will be referred to a specialist for further care and management.