MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
Breast mammograms. Doctor discussing a breast X- ray (mammogram) on a light box with a female patient. Mammography is a means of screening women for breast cancer. A dense, and hence bright, region may indicate the presence of a tumour. Harmless fluid-filled cysts can be distinguished from solid tumours using ultrasound. If the lump is a tumour, then a biopsy (tissue sampling) is necessary to confirm whether it is benign or cancerous (malignant). Cancerous tumours must be surgically removed. Photographed at the European Institute of Oncology in Milan, Italy.
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