FIGURE 6. Coronal and sagittal projections of TYR PET study of patient with large, recurrent squamous cell carcinoma of right maxillary sinus extending into skull base show irregularly increased TYR uptake in tumor (thick arrows). Because of irradiation, uptake in both parotid glands and right submandibular gland has disappeared, and uptake in left submandibular gland is visible (thin arrows).

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