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Intractable recurrent ulcers in the pharynx of unknown cause are resistant to treatment. A 34year-old man with a recurrent ulcer was treated at our hospital. Because of the association with inflammatory changes of the lingual tonsil, we vaporized the lingual tonsil using a CO2 laser. After this procedure, his pharyngeal ulcer was cured and no recurrence of the disease has been noted for 2 years. Focal infection may be one of the causes of this disease.

Recurrent Ulcer in the Pharynx Successfully Treated by Laser Surgery on the Lingual Tonsil