Abstract
The great strength of mammography is its ability to detect breast cancers before they grow large enough to be palpable. With the current increased use of mammography screening, it has become more and more important for radiologists to recognize the earliest presenting features of carcinomas. Some nonpalpable cancers demonstrate conventional mammographic features of malignancy, albeit on a smaller than usual scale, whereas others present with mammographic signs that are far from characteristic of malignancy. Success in mammography screening requires not only excellent radiographic technique but also full knowledge of the subtle features with which very small cancers can present.