Abstract
In recent years, immune checkpoint inhibitors (ICIs), including nivolumab and pembrolizumab have revolutionized the treatment landscape in recurrent/metastatic (R/M) head and neck squamous cell carcinoma (HNSCC). However, many patients do not respond to ICIs for reasons that remain largely unknown. For patients who progress on ICIs, chemotherapy and/or biologic therapies are the most widely used treatments based on the clinician's choice, with no defined sequence strategy. We report the experience of a patient with metastatic oropharyngeal squamous cell cancer p16 and human papillomavirus-DNA positive who received chemotherapy with weekly paclitaxel after progressing on nivolumab. Our patient presented a partial response to fourth line paclitaxel, which lasted more than 2 years, with an improvement of his quality of life too. These results support the hypothesis of synergism between immunotherapy and conventional chemotherapies. Even in the setting of immune-refractory disease, immunotherapy may affect tumor immune microenvironment thus leading to a synergistic effect with conventional chemotherapy and achieving unexpected results.
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