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Oral cavity examination of a patient with oral cavity cancer using white-light (A) and autofluorescence mode (B). Abnormal mucosa around the cancerous area is clearly seen as autofluorescence loss compared with the surrounding normal healthy mucosa. An arrow indicates cancerous mass arising from buccal mucosa. Structure P: hard palate, Q: tongue, R: upper lip, S: lower lip (Figure is from author’s own collection).
