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A 57-year-old male patient, diagnosed with HPV positive T2N2c squamous cell carcinoma of left base of the tongue and treated with definitive chemoradiation (6996cGy in 33 fractions), developed a spontaneous exposed bone measuring 1.5 × 0.5 cm in the lingual posterior mandible adjacent to right mandibular first and second molars, consistent with Notani Stage II ORN. The exposed bony edges were sharp causing irritation to adjacent soft tissues.
