Your doctor will do a physical examination of the affected breast. Tests will be needed to confirm the diagnosis, and to find out whether the cancer has spread. You may have some or all of the tests described below.

Mammogram (breast x-ray) Mammograms may be used to look for changes in the breast, but ultrasound is generally more helpful for diagnosing breast cancer in men.

Ultrasound scan A scan using sound waves is used to see whether a lump is solid or contains fluid. A small amount of clear gel is applied to the breast area. Then a small microphone-like device is rubbed over the area to show a picture of the breast on a monitor screen.