Rate of BRCA mutation in patients tested under NCCN genetic testing criteria.

BACKGROUND: BRCA genetic testing is recommended by the National Comprehensive Cancer Network (NCCN) in breast cancer patients who meet specific criteria. Limited data are available on the likelihood of detecting a mutation when these guidelines are followed. METHODS: A retrospective chart review examined patients with breast cancer who underwent BRCA testing based on NCCN guidelines. RESULTS: Twelve (6.0%) of the 199 patients had a deleterious BRCA mutation. Family history of BRCA mutations (50%, p = 0.019), age ≤45 at diagnosis (9.7%, p = 0.034) and meeting ≥3 NCCN criteria (13.3%, p = 0.03) yielded the highest rates of BRCA mutation. Having a family history of BRCA mutation and age ≤45 were associated with increased rate of BRCA mutation on multivariate analysis (OR 14.3, CI 1.2-166.3; OR 11.6, CI 1.2-108.6). CONCLUSION: Select NCCN criteria are associated with higher rates of BRCA mutations. Waiting for genetic testing results to guide surgical management may be warranted in this subset of patients.