To jiamei and other doctors

I just had my left-side thyroid removed because of a lump growing on the side. I had two FNA before and both showed the lump was cyst. Three weeks after the surgery, the surgeon told me that a small cancerous tumor (1mm) was found, but he said I don't need other treatment, just to monitor every year. He seems very sure, but I am not so sure. I would like second opinion. Thanks