Early detection of breast cancer: From the age of 20, you should be screened for cancer by your gynecologist once a year. The examination does not prevent cancerous diseases, but disease changes are usually detected early in this way and the chances of a cure are thus markedly improved. During the follow-up examination, in addition to the cervix, the breasts will also be examined for tissue changes. The doctor will feel your breast and armpits and also perform an ultrasound investigation if needed. An annual examination is not enough for breast cancer screening, so you will have to examine your breasts yourself using your hands approximately once a month. Your gynecologist will give you instructions on how to do this. (See also self examination) A mammogram is recommended from the age of 50. This is an X-ray examination of the breast. This examination is rarely performed in younger women, since disease changes in firm breast tissue cannot be as clearly identified using mammography.