Anything above 2.0 SUV uptake is suspicious for cancer. Not sure about size=uptake value, but may as they may take in more glucose due their size. PET's are so sensitive. I heard them being able to detect up to 5mm, while a CT, MRI it may be 1cm, and that's why I would rather have a PET/CT, a Sonogram is better than all three in the cervical neck, and had similar size detected before by PET that wound up being cancerous with uptake of 2.3, 2.5. I just hope the pathologist can get a sample, and doubt it's a nodule, but I have several other pathologists I dealt with elsewhere. I'm never short of doctors lol.