Hopefully it's not a recurrence, and something else minor. It could be reminiscent cancer, missed last time. I know for scc, at least in the lymph nodes after surgery, if cancer come back, it usually does at the surgical line, and did twice in my case, but I forget why that happens. You are still in a good position for cure, being you only had prior excisional surgery, , and all your options seem open. If you had prior therapy, surgey, radiation, chemo, and even lymph node invlolvemnt, that changes prognosis, but these days more is being done with accurate radiation, reirridation, radiossenting drugs, and surgical techniques. I'm not familiar with tongue Cancat, as I am my own, but similar in ceryain aspects. Chemo and radiation may be considered if it is a recurrence due the possibility of microscopic cancer is missed and lymoh node involvemnt. As mentioned, get your tests done first, and good you caught it early. Best of luck.