Neoadjuvant chemotherapy followed by surgery for HPV-associated tonsillar cancer: Does imaging reflect the pathological response?

Objectives: The purpose of this study was to present our evaluation of the outcome of tonsillar cancer managed with neoadjuvant chemotherapy followed by surgery as definitive treatment.Materials and methods: Thirty-eight patients with human papilloma virus (HPV)-associated tonsillar cancer were treated with neoadjuvant chemotherapy followed by surgery. The volume reduction response of the tumor to neoadjuvant chemotherapy was evaluated and verified by histopathology.Results: The complete pathologic response (pCR) rates at primary and nodal sites were 60 % and 45 %. Tumor volume reduction >= 78.8 % following neoadjuvant chemotherapy predicted pCR of the cervical node. In addition, the optimal cut-off value to predict pCR at the primary tumor site was 83.4 % volume reduction but was not a significant result. For pCR, neoadjuvant chemotherapy decreased the pathological adverse features, significantly reducing the need for adjuvant therapy. The overall survival of the adjuvant group was 79.2 %, and that of the non-adjuvant group was 87.5 %, with disease-free survival of 65.9 % and 54.2 %. There was no significant difference between the two groups.Conclusion: Neoadjuvant chemotherapy followed by surgery proved to be a good therapeutic option for management of HPV-associated tonsillar cancer. A greater reduction in tumor volume in post-neoadjuvant chemotherapy imaging predicts a complete pathologic response.

Automated summary

This study evaluated the outcome of tonsillar cancer managed with neoadjuvant chemotherapy followed by surgery. The results showed that neoadjuvant chemotherapy reduced tumor volume and pathological adverse features, significantly decreasing the need for adjuvant therapy. A greater reduction in tumor volume predicted a complete pathologic response. There was no significant difference in survival rates between the groups.