Abstract
Purposes
Trastuzumab is known to be effective for early and advanced stages of breast cancer but optimal duration for early-stage breast cancer (EBC) is not well known. We evaluated the efficacy and toxicity of 9- and 52-week trastuzumab therapy for EBC retrospectively.
Methods
In this multicenter study, the medical records of all patients with EBC were analyzed in 8 centers retrospectively. Totally consecutive, 479 female patients who received trastuzumab in the adjuvant treatment were evaluated for disease-free survival (DFS), overall survival (OS), efficacy, and toxicity.
Results
There were 181 (37.8 %) and 298 (62.2 %) patients in the 9- and 52-week trastuzumab groups, respectively. Median follow-up was 30.6 months (5.7–68.9) in the 9-week trastuzumab group and 29.3 months (5.9–59.6) in the 52-week trastuzumab group. Thirty-six month DFS was 90 and 85 % (P = 0.132) in the 9- and 52-week trastuzumab treatment groups, respectively, and 36-month OS was 96 and 97 % in the 9- and 52-week trastuzumab groups, respectively (P = 0.779). Symptomatic cardiotoxicity was observed in 1 (0.6 %) patient in the 9-week trastuzumab group and in 4 (1.3 %) patients in the 52-week trastuzumab group.
Conclusions
In this study, similar outcomes were found in the 9- and 52-week trastuzumab treatment groups.
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Tonyali, O., Coskun, U., Sener, N. et al. Nine-week trastuzumab treatment versus 52-week trastuzumab treatment for HER2-positive early-stage breast cancer. J Cancer Res Clin Oncol 138, 2145–2151 (2012). https://doi.org/10.1007/s00432-012-1296-x
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DOI: https://doi.org/10.1007/s00432-012-1296-x