Mammographic morphology and distribution of calcifications in ductal carcinoma in situ diagnosed in organized screening.

Background: Ductal carcinoma in situ of the breast (DCIS) represents a challenge in mammographic screening due to its unknown progression into invasive cancer. The majority of the DCIS is detected due to signs of calcifications on the mammograms.

Purpose: To analyze the combinations of mammographic morphology and distribution of calcifications by Van Nuys nuclear grade (grade).

Influence of review design on percentages of missed interval breast cancers: retrospective study of interval cancers in a population-based screening program.

Purpose: To retrospectively investigate whether different review designs have an influence on the estimate of missed interval cancer in a population-based breast cancer screening program.

Materials And Methods: The Norwegian Breast Cancer Screening Program invites women aged 50-69 years to undergo biennial screening mammography. The current study was part of the evaluation and scientific aspects of the screening program and thus was covered by the general ethical approval of the screening program as a part of the Cancer Registry of Norway.