Adjuvant radiotherapy and chemotherapy in breast cancer: 30 year follow-up of survival
1 University Department of Surgery, Faculty of Medicine, University of Glasgow, Royal Infirmary, Glasgow, UK, G31 2ER
2 West of Scotland Cancer Surveillance Unit, Section of Public Health and Health Policy, Faculty of Medicine, University of Glasgow, Glasgow, UK, G12 8RZ
BMC Cancer 2010, 10:398 doi:10.1186/1471-2407-10-398Published: 30 July 2010
The long term outcome (more than 15 years) of adjuvant treatment in patients with primary operable breast cancer has rarely been examined.
A randomised clinical trial of radiotherapy, chemotherapy (28 day cycles of cyclophosphamide, methotrexate and 5-fluorouracil) or both on women with primary operable breast cancer (n = 322) was followed-up for a median of 27 years.
260 (81%) patients died, 204 (78%) from breast cancer. Cancer specific survival (SE) at 10 years, 20 years and 30 years was 41 (3)%, 34 (3)% and 33 (3)% respectively. Presence of more than 3 involved lymph nodes increased cancer-specific mortality (HR 1.88, 95% CI 1.34-2.63) after adjustment for age, socio-economic deprivation and adjuvant treatment. Both age (HR 1.63, 95% CI 1.19-2.22) and involved lymph nodes (HR 1.59, 95% CI 1.17-2.14) were significant predictors of all-cause mortality after adjustment for other factors. There was no significant difference in all-cause or cancer-specific survival between patients in each of the 3 treatment arms.
The present study highlights the long term impact of node positive disease but does not indicate that any regimen was associated with significantly better long-term survival.