RT Journal Article SR Electronic T1 Discovery of Breast Cancers Within 1 Year of a Normal Screening Mammogram: How Are They Found? JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 512 OP 518 DO 10.1370/afm.580 VO 4 IS 6 A1 Patricia A. Carney A1 Elizabeth Steiner A1 Martha E. Goodrich A1 Allen J. Dietrich A1 Claudia J. Kasales A1 Julia E. Weiss A1 Todd MacKenzie YR 2006 UL http://www.annfammed.org/content/4/6/512.abstract AB PURPOSE We sought to determine how breast cancers that occur within 1 year after a normal mammogram are discovered. METHODS Using population-based mammography registry data from 2000–2002, we identified 143 women with interval breast cancers and 481 women with screen-detected breast cancers. We surveyed women’s primary care clinicians to assess how the interval breast cancers were found and factors associated with their discovery. RESULTS Women with interval cancers were twice as likely to have a personal history of breast cancer (30.1%) as women with screen-detected cancers (13.6%). Among women with interval cancers, one half of the invasive tumors (49.5%) were discovered when women initiated a health care visit because of a breast concern, and 16.8% were discovered when a clinician found an area of concern while conducting a routine clinical breast examination. Having a lump and both a personal and a family history of breast cancer was the most common reason why women initiated a health care visit (44%) (P <.01). CONCLUSIONS Women with interval cancers are most likely to initiate a visit to a primary care clinician when they have 2 or more breast concerns. These concerns are most likely to include having a lump and a personal and/or family history of breast cancer. Women at highest risk for breast cancer may need closer surveillance by their primary care clinicians and may benefit from a strong educational message to come for a visit as soon as they find a lump.