The value of positron emission tomography with a radioactive tracer (FDG-PET) is in question after the results of a new study show it isn’t effective in detecting small metastases in patients with head and neck cancer. To form a prognosis for head and neck squamous cell cancers, doctors need to know if it has spread to nearby lymph nodes. While a patient may seem to be clinically clean, he may actually have small metastases.
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