It depends if further treatment will be necessary. What do the doctors say? What is the T stage? That matters, as does clear margins, extracapsular spread, other adverse featurees, like perineural, lymphovascular invasion, close margins. I had close margins last May from a neck dissection, with adverse features, and needed chemo and radiation, minimum, and less than a month, cancer went to the elliptical layer of the skin. I wound up having a resection with a flap, high dose IORT radiation, and chemoradiation. They are not going to substitute PET scans for treatment of cancer, If it's needed. Good luck.