Medical Dept. Int. Med. 3, Hematology and Oncology, Hanusch-Krankenhaus, Vienna, Austria
Felix Keil , Maximilian Hartl , Gabriela Altorjai , Martin Pecherstorfer , Beate Mayrbäurl , Alexander de Vries , Andrea Berghold , Regina Riedl , Michael A. Fridrik , Thorsten Fuereder , Martin Burian , Richard Greil
Background: Induction chemotherapy (ICT) with Cisplatin (P), 5-FU (F) and Taxanes (T) is a therapeutical option in patients suffering from locally advanced or unresectable stage III or IV squamous cell carcinoma of the head and neck (SCCHN). The role of ICT is controversial and toxicity and/or delay of radiotherapy may reduce the potential benefit of this treatment regimen. Here we report promising results of a randomized phase II trial comparing TPF with TP and Cetuximab (C) replacing F. Methods: In our trial, N= 100 patients with locally advanced or unresectable stage III or IV SCCHN were randomly assigned to either Arm A (N= 49), receiving TPF, or Arm B (N= 51), receiving TPC, both followed by radiotherapy (RT) + C. The primary end-point of the study was overall response rate (ORR) three months after RT + C was finished. Results: We observed a remarkable response rate (CR + PR) of 86.4% in the TPC-arm that compared favorably with 77.5% responding patients in the TPF-arm three months after RT + C was completed. OS and PFS were similar in both arms. After 400 days we observed an OS rate of 79% in the TPF and 86% in the TPC arm, and a PFS rate of 67% in the TPF and 70% in the TPC arm. TPC containing ICT led to less serious adverse events (SAEs), including blood and lymphatic disorders (40.8% in TPF arm, 27.5% in TPC arm) and metabolism and nutrition disorders (22.4% in TPF arm, 9.8% in TPC arm) during ICT. Interestingly, in HPVp16 positive patients, 88.24% in the TPF-arm and 93.33% in the TPC-arm showed CR or PR three months after RT + C, whereas only 69.57% in the TPF-arm and 82.76% in the TPC-arm showed CR or PR. We only lost one patient because of treatment-related mortality (TRM) and no delay from the end of ICT to local radiotherapy was observed in any patient. All patients received RT + C within three weeks after ICT was completed. Conclusions: In conclusion, TPC is a feasible and tolerable therapy regimen and can be applied within one day with less hematological toxicities. In contrast, more local reactions were observed after TPC. TPC containing ICT leads to improved response rates, while OS and PFS were similar in both arms. TRM was extremely low with 1%. Therefore, we conclude, that TPC containing ICT could be a considerable therapeutical alternative for patients with locally advanced or unresectable stage III or IV SCCHN, who are eligible for ICT. Clinical trial information: 2011-005540-99.
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