In head and neck squamous cell carcinoma (HNSCC), the presence of lymph node metastases in addition to free resection margins following surgical resection of the primary tumor is an important prognostic factor, and may impact planning of surgery as well as of radiotherapy. Until now, imaging modalities including PET/CT and MRI did not allow to exclude especially small lymph node metastases. Compared to standard whole-body PET/CT acquisition techniques, high-resolution (HR) head and neck PET/CT acquisitions promise improved detection of lymph node metastases in head and neck squamous cell carcinoma (HNSCC). This prospective study aims to determine the sensitivity and specificity of lymph node staging with HR FDG-PET/CT in HNSCC by correlating PET/CT with histopathology after neck dissection. HR PET/CT may have a relevant impact on the therapeutic concept, and the planning and dose prescription of radiotherapy.
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Diagnostic accuracy (sensitivity, specificity, accuracy, NPV und PPV) of HR PET/CT in comparison to the histopathological reference standard
Timeframe: At baseline