No difference in disease-free survival after oral cancer resection with close tumor margins in patients with and without postoperative radiotherapy

This 2018 retrospective cohort study analyzed outcomes in 418 patients with oral or oropharyngeal squamous cell carcinoma based on margin status post-resection: clear (>5 mm), close (1–5 mm), and positive (≤1 mm). The 5-year disease-free survival (DFS) for patients with clear and close margins was not significantly different (79.3% vs.