FDG‐PET‐CT / MRI in head and neck squamous cell carcinoma: Impact on pretherapeutic N classification, detection of distant metastases, and second primary tumors

Background To assess the effect of 18‐fluorodeoxyglucose positron emission tomography (FDG‐PET) in the pretherapeutic staging of N classification, detection rate of distant metastases, and second primaries. Methods Retrospective study on patients with head and neck carcinoma. We compared pretherapeutic N classification by ultrasound, computed tomography (CT)/magnetic resonance imaging (MRI), and FDG‐PET‐CT/MRI. Results A change in the N...