The NeoScorch HN study is a single institution multisite phase II trial including 3 cohorts of 25 patients each for patients with newly diagnosed locoregionally advanced, histologically confirmed, head and neck cancer eligible for curative-intent treatment, who will receive neo-adjuvant chemoimmunotherapy-based treatment as well as standard of care adjuvant treatment. The three cohorts include three different aspects of surgical de-escalation in head and neck cancer. The first cohort includes human papillomavirus independent (HPV-) squamous cell carcinoma of the head and neck. The second cohort includes HPV-associated head and neck cancer with radiographic evidence of extranodal extension in neck lymphadenopathy. The third cohort specifically includes malignancies of the sinonasal cavity and skull base which have a propensity for invasion of the orbit, skull base, and maxilla. Surgical treatment of all three of these cohorts has significant morbidity including swallowing, speech, and vision among others.