Breast cancer: breast ultrasound

Breast ultrasound is a procedure that may be used to determine whether a lump is a cyst (sac containing fluid) or a solid mass. If it is found to be a cyst, fluid is typically withdrawn from it using a needle and syringe (a process called aspiration). If clear fluid is removed and the mass completely disappears, no further treatment or evaluation is needed.

Ultrasound can also be used to locate precisely the position of a known tumour in order to guide the specialist during a biopsy or aspiration procedure. Ultrasound helps confirm correct needle placement.

Ultrasound testing works by transmitting high-frequency sound waves, inaudible to the human ear, through the breast. The sound waves bounce off surfaces in the breast (tissue, air, fluid) and these "echoes" are recorded and transformed into video or photographic images.

Are there any side effects from breast ultrasound procedure?

Studies have shown that breast ultrasound is not hazardous. There are no harmful side effects. In addition, ultrasound does not use radiation, as X-ray tests do.

What happens during a breast ultrasound test?

• No special preparation is needed for a breast ultrasound test.
• You will be asked to change into a hospital gown so you may consider wearing a two-piece outfit on the day of the test so that you only need to remove your top.
• You will lie on a padded examining table during the test.
• A small amount of water-soluble gel is applied to the skin over the area to be examined. The gel does not harm your skin or stain your clothes.
• A probe that looks like a little paddle is gently applied against the skin.
• You may be asked to hold your breath briefly several times.
• The ultrasound test takes about 10 minutes to complete.
• After the test, the gel will be wiped off your skin. Your doctor will discuss the test results with you.