CHRIS BJORNBERG / SCIENCE PHOTO LIBRARY CHRIS BJORNBERG / SCIENCE PHOTO LIBRARY
False-colour mammogram showing a cancerous tumour of a woman's breast. The tumour is highlighted in red & gold. Mammography is an X-ray technique that is used to examine the soft tissues of the breast. Its principal use is in screening women for breast cancer. In the U.K., this screening programme is presently (1991) limited to women who are over 50 years of age, who are considered to be at most risk of developing the disease. Breast cancer does, however, strike younger women and there is much debate relating to the benefit of lowering the qualifying age for screening. Controversy also exists over the merits of encouraging all women to examine their own breasts for abnormal lumps.
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