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자료유형
학술저널
저자정보
저널정보
한국유방암학회 Journal of Breast Cancer Journal of Breast Cancer Vol.18 No.1
발행연도
2015.1
수록면
36 - 43 (8page)

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Purpose: This study investigated the clinicopathological featuresof operable breast cancer lesions located in different hemispheresof the breast and determined related survival outcomes. Methods: Data from 5,330 patients with invasive ductal carcinomawere retrospectively analyzed based on tumor location. Results:The median follow-up time was 68 months (range, 18–176months). Patients with breast cancer located in the outer hemisphereof the breast had lesions with more advanced nodalstages and more frequently received adjuvant chemotherapythan patients with breast cancer in the inner hemisphere. The5-year disease-free survival (DFS) rates of patients with tumorslocated in outer versus inner hemispheres were 81.5% and77.0%, respectively (p=0.004); the overall survival (OS) rateswere 90.7% and 88.8%, respectively (p<0.001). The associationbetween tumor location and the 5-year DFS rate was most apparentin node-positive patients (73.1% vs. 65.8% for outer vs. inner hemisphere lesions, p<0.001) and in patients with primarytumors greater than 2 cm in diameter (78.2% vs. 72.3%,p=0.002). Multivariate analysis showed that tumor location wasan independent predictor of DFS (hazard ratio [HR], 1.23;p=0.002) and OS (HR, 1.28; p=0.006). There were no significantdifferences in 5-year DFS or OS rates between patients with outerversus inner hemisphere tumors when internal mammary nodeirradiation was performed. Conclusion: This study demonstratedthat tumor location was an independent prognostic factor foroperable breast cancer. Internal mammary node irradiation isrecommended for patients with breast cancer of the inner hemisphereand positive axillary lymph nodes or large primary tumors

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