Mammographic features of ductal carcinoma in‐situ — a pictorial review

Abstract Ductal carcinoma in situ (DCIS) is a precancerous form of breast cancer which can progress to invasive disease. The vast majority of DCIS cases are detected with mammography, where it is most commonly seen as microcalcification. There are many patterns of microcalcification, and distinguishing between these patterns can be confusing, particularly for inexperienced mammogram readers or clinicians. Analysing the microcalcification morphology and distribution stratifies the risk of DCIS and allows identification of cases with intermediate or high probability. This article gives a pictorial overview of pure DCIS cases detected in a screening programme with a focus on the patterns that are suggestive of DCIS.