Abstract
Purpose
Bevacizumab, a humanized monoclonal antibody against vascular endothelial growth factor, has shown increased pathological complete response rates when added to neoadjuvant chemotherapy. In various cancer types, bevacizumab treatment was accompanied by an increased risk of bleedings and other surgical complications. We assessed associated surgical complications.
Methods
In the GeparQuinto trial, 1,948 patients were randomized to receive four cycles epirubicin/cyclophosphamide (EC, 90/600 mg/m2 q3w) followed by four cycles docetaxel (D, 100 mg/m2 q3w) each with (ECB-DB) or without (EC-D) bevacizumab (B, 15 mg/kg q3w) concurrent with chemotherapy. Surgery had to be performed not earlier than 28 days after the last bevacizumab infusion, but within days 21 and 35 after the last chemotherapy.
Results
In 743 (38.1 %) patients, a surgical complication (bleedings, hematomas, necrosis, wound infections, abscess) was documented prospectively. Baseline characteristics of the patients were well balanced between both arms. The breast-conserving surgery (BCS) rate (N = 502) was 69.1 % (EC-D) and 71.9 % (ECB-DB; p = 0.464). The first surgical procedure was performed at a median of 29 (EC-D) and 34 days (ECB-DB) after last chemotherapy with or without bevacizumab infusion (p < 0.001). Surgical complications were documented in 38 (10.9 %; EC-D) and 59 (15.0 %; ECB-DB) patients (p = 0.103). Surgical complications were significantly higher after ECD-DB only in patients treated with BCS (N = 53; p = 0.029) or in those requiring repeat surgery in order achieve clear margins (N = 23; p = 0.037) compared to the EC-D group.
Conclusions
Addition of bevacizumab to neoadjuvant chemotherapy might be associated with an increased risk for surgical complications in patients treated with BCS or after repeated surgeries.
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Acknowledgment
We thank all patients and investigators for participation and Sanofi-Aventis and Roche, Germany, for financial support of this trial (NCT 00567554).
Disclosure
Gunter von Minckwitz has received honoraria and research found from Roche. Holger Eidtmann has received personal fees from Roche. Claus Hanusch has received personal fees from Novartis, Amgen, and Boeringer Ingelheim. Jens Blohmer has received honoraria from Roche. Jens Huober has received personal fees from Roche and Sanofi Aventis. Sibylle Loibl has received honoraria and research found from Roche. The other authors declare no conflict of interest.
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On behalf of the AGO B and the German Breast Group Investigators
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Gerber, B., von Minckwitz, G., Eidtmann, H. et al. Surgical Outcome after Neoadjuvant Chemotherapy and Bevacizumab: Results from the GeparQuinto Study (GBG 44). Ann Surg Oncol 21, 2517–2524 (2014). https://doi.org/10.1245/s10434-014-3606-9
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DOI: https://doi.org/10.1245/s10434-014-3606-9