A review of interval breast cancers diagnosed among participants of the Nova Scotia Breast Screening Program.

Purpose: To conduct a radiologic review of interval breast cancer cases to determine rates of true interval and missed cancers in Nova Scotia, Canada.

Materials And Methods: This quality assurance project was exempt from institutional review board approval. Interval cancer cases were identified among women aged 40-69 years who were participants in the Nova Scotia Breast Screening Program from 1991 to 2004.