¹⁸F-FDG Uptake Characteristics in Differentiating Benign from Malignant Nasopharyngeal Lesions in Children

Figure 2

CT (top), PET (middle), and PET/CT (bottom) scans of patient number 1 (a–d). (a) and (c) were for initial staging: pretherapy scans showing diffuse soft-tissue thickening and ¹⁸F-FDG accumulation in nasopharynx (, 18) (a) and intense uptake in retropharyngeal lymph node and bilateral cervical lymph nodes (, 8.3) (c). (b) and (d) were for follow-up staging: scans after seven cycles of docetaxel-based chemotherapy and nasopharyngeal and cervical radiotherapy showing slight ¹⁸F-FDG uptake in right nasopharynx (, 4.0) (b) and no uptake in lymph node metastases (d). (e) Photomicrograph of patient number 1 showing poorly differentiated squamous cell carcinoma consistent with NPC (hematoxylin and eosin, ×100).

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