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Purpose National Comprehensive Cancer Network guidelines recommend systemic staging imaging at the time of locoregional breast cancer recurrence. Limited data support this recommendation. We determined the rate of synchronous distant recurrence at the time of locoregional recurrence in high-risk patients and identified clinical factors associated with an increased risk of synchronous metastases. Methods A stage-stratified random sample of 11,046 patients with stage II to III breast cancer in 2006 to 2007 was selected from the National Cancer Database for participation in a Commission on Cancer special study. From medical record abstraction of imaging and recurrence data, we identified patients who experienced locoregional recurrence within 5 years of diagnosis. Synchronous distant metastases (within 30 days of locoregional recurrence) were determined. We used multivariable logistic regression to identify factors associated with synchronous metastases. Results Four percent experienced locoregional recurrence (n = 445). Synchronous distant metastases were identified in 27% (n = 120). Initial presenting stage ( P = .03), locoregional recurrence type ( P = .01), and insurance status ( P = .03) were associated with synchronous distant metastases. The proportion of synchronous metastases was highest for women with lymph node (35%), postmastectomy chest wall (30%), and in-breast (15%) recurrence; 54% received systemic staging imaging within 30 days of a locoregional recurrence. Conclusion These findings support current recommendations for systemic imaging in the setting of locoregional recurrence, particularly for patients with lymph node or chest wall recurrences. Because most patients with isolated locoregional recurrence will be recommended locoregional treatment, early identification of distant metastases through routine systemic imaging may spare them treatments unlikely to extend their survival.

Risk of Synchronous Distant Recurrence at Time of Locoregional Recurrence in Patients With Stage II and III Breast Cancer (AFT-01)