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The main aim of this study was to describe the oral complications arising from post-Radiotherapy\/chemoradiation among HNC patients through a retrospective survey of 80 patient records. This study collected patients\u2019 comorbid illness and treatment details alongside oral complications. The record review included one-year follow-up details of HNC patients post-completion of radiotherapy\/chemoradiation. Among the 80 patients who completed head and neck radiotherapy, 23 experienced interrupted treatment. Among them, most (15%) did not tolerate chemotherapy, which is part of chemoradiation. Thirty-four patients were followed up for oral complications. Most patients experienced symptoms of restricted mouth opening 12(15%), mucositis 6(7.5%), and oral pain 5(6.25%) as oral complications during the subsequent follow-up. Approximately 14 patients reported HNC recurrence. These postradiotherapy\/chemoradiation-related oral complications pose a difficult challenge to patients and their caregivers. Awareness of such oral complications will enable healthcare providers to recognize and institute early interventions to provide patients with a better quality of life.<\/jats:p>","DOI":"10.1038\/s41598-025-10598-7","type":"journal-article","created":{"date-parts":[[2025,7,10]],"date-time":"2025-07-10T08:50:52Z","timestamp":1752137452000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Retrospective evaluation of oral complications following radiotherapy and chemoradiation in patients with head and neck Cancer"],"prefix":"10.1038","volume":"15","author":[{"given":"Radhika R.","family":"Pai","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ravikiran","family":"Ongole","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sourjya","family":"Banerjee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,7,9]]},"reference":[{"key":"10598_CR1","unstructured":"V\u00e4is\u00e4nen, J. 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