1. True or false: The correct staging of the cervical lymph nodes is critical to determine the necessary extent of surgery (type of neck dissection) and for precise delineation of the radiotherapy field in patients with head and neck cancer.
2. True or false: Fluorodeoxyglucose positron emission tomography (FDG PET) is as sensitive (85% to 90%) as conventional imaging for detection of nodal metastases in the initial staging of head and neck cancers.
3. True or false: In patients with an N0 stage of the disease (no evidence of metastatic disease to the lymph nodes by clinical examination or conventional imaging), PET is a reliable modality to exclude malignant involvement of cervical lymph nodes.
4. True or false: Approximately 20% to 30% of patients with N0 disease are found to have metastatic disease at surgery, and 40% of these cervical node metastases are less than 1 cm in size.
5. True or false: Positron emission tomography/computed tomography (PET/CT) has not been shown to be more accurate than PET alone for staging patients with head and neck cancer.
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