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Abstract

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Purpose: Between January 1983 and December 1988, 218 female patients with known breast cancer and positive axillary nodes were treated with adjuvant radiotherapy and chemotherapy following radical mastectomy. Treatment results were
retrospectively
analysed at the Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University of College of Medicine.
Materials and Methods: The patients were classified into 3 groups; group 1 included 80
patients treated with adjuvant chemotherapy alone; in group 2, 52 patients treated with
radiotherapy alone; and in group 3, 86 patients treated with combined
chemo-radiotherapy. The mean age was 44 years and ranged from 27 to 70. The median
follow-up time was 51 months.
Results; Seven-year relapse free and overall survival rates were 56% and 67%; in group
1, 50% and 56%; in group 2, 51% and 65%; and in group 3, 62% and 75% respectively.
This difference was not statistically significant(p<0.05). The loco-regional failure rates
were 13% and distant failure rates were 33%. There was less risk of loco-regional
failure in group 2 and 3 which included radiotherapy (p<0.05). But three was no
significantly difference in the rates of distant failure(p<0.05). By univariate analysis, the
only significant prognostic factor affecting relapse-free survival was the percentage of
positive axillary nodes; and the overall survival significantly correlated with the primary
tumor size, the number or percentage of positive axillary nodes, and stage. But in
multivariate analysis, the only significant prognostic factor was treatment modality. By
univariate analysis of prognostic factors affecting the rates of overall failure and distant
failure, th significant prognostic factors was the percentage of positive axillary nodes;
and the risk of the loco-regional failure significantly correlated with the treatment
modality.
Conclusion: In conclusion, these results suggest a potential for decreasing the risk of
loco-regional failure with the addition of postoperative radiotherapy to chemotherapy in
the premenopausal patients, and in the patients with number or percentage of positive
condes more than 4 or 1/3. The results of this study suggest that the combined
chemo-radiotherapy as adjuvant treatment following radial mastectomy was the most
effective modality in group of 2~5cm sized tumor, stage ¥±B, and in patients with more
than 4 or 1/3 of number or percentage of positive nodes.

Å°¿öµå

À¯¹æ¾Ï; º¸Á¶ÀûÄ¡·á; ¹æ»ç¼±Ä¡·á; Ç׾Ͼ๰ġ·á; Breast cancer; Adjuvant treatment; Radiotherapy; Chemotherapy;

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