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FIGURE 1. FDG PET (A–D) and 131I scintigraphy (E) of patient G (Table 1). (A and B) Unsuspicious findings under TSH suppression with thyroxine. (C and D) After 31 d, note findings suggestive of malignancy in left paralaryngeal area (arrow) under conditions of hypothyroidism. (E) Normal visualization of pharyngeal mucosa and salivary glands with identification of several pulmonary and one mediastinal metastasis right of midline (all FDG negative). No evidence of 131I uptake is seen in projection onto PET findings. Local recurrent disease was verified histologically 1 mo later.
