Fig 1. Patient 3, a 46-year-old man status post 7 months of radiation therapy (72 Gy) for treatment of a squamous cell carcinoma of the left oropharynx, with a nonenhancing ulceration with negative biopsy results (category 1) in the left oropharynx (arrows). This patient has been followed for 11.5 months since initial diagnosis without evidence of tumor recurrence.