ABSTRACT
Breast cancer is the commonest malignancy in women. Most breast cancers arise from tissues in the terminal ductal/lobular units of the breast. Invasive ductal carcinoma is the most common type, accounting for about 70 per cent of cases of breast cancer. Breast cancer may present clinically as a palpable breast mass, or less commonly with other symptoms such as nipple discharge. Consequences of diagnosis of breast cancer at an earlier stage include reduced risk of metastatic disease and local recurrence, and requirement for less radical therapy. The main goal of breast imaging, whether it is in women with specific symptoms or in screening of asymptomatic women, is early diagnosis of breast cancer. Mammography is a radiographic examination of breast. Digital breast tomosynthesis is a further extension of digital mammography, in which multiple projection exposures are obtained from a mammographic X-ray source that moves over a limited arc. Breast biopsy is usually performed under imaging guidance, either mammography or ultrasound.
