A study in a radiology journal found that 18F-FDG PET/CT outperformed CT/MRI in detecting occult neck metastasis. In research involving 91 patients with head and neck squamous cell carcinoma, PET/CT detected occult cervical metastatic nodes in 27 of 38 cases. However, there is still a role for CT/MRI, the authors wrote: "Although CT/MR imaging is less sensitive than 18F-FDG PET/CT, it is still required for pretreatment evaluation of primary and neck diseases."

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