RATIONALE: Studying samples of DNA in the laboratory from women who are BRCA1/BRCA2 mutation carriers may help doctors learn more about cancer and identify biomarkers related to cancer. PURPOSE: This research study is looking at breast cancer risk in women who are BRCA1/BRCA2 mutation carriers.
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DISEASE CHARACTERISTICS: * Known positive BRCA1/BRCA2 mutation carrier * With or without a personal history of breast cancer prior to enrollment in clinical trial GOG-0199 * Currently enrolled in clinical trial GOG-0199 AND meets the following criteria: * Completed baseline questionnaire (BQ-199) * Provided information on prior breast cancer history, including date of diagnosis * Provided complete data from the DNA analysis on the genetic variants of interest * Signed an approved informed consent and authorization permitting release of personal health information * Hormone receptor status not specified PATIENT CHARACTERISTICS: * Menopausal status not specified PRIOR CONCURRENT THERAPY: * See Disease Characteristics