how can a doctor tell is a thyroid nodule is more than likely benign by the feel?
my fiance is 19. he is generally healthy and he has no family history of cancer, or been exposed to a lot of radiation in his head or neck. about 2 1/2 weeks ago he found a very mobile lump, on his neck just below his voice box. it moves easily side to side with the skin. we went to the doctor, and the doctor examined him, took his bp, and temp, and weight. he had not lost any weight and everything else was ok. the doctor said he wasnt concerned about the lump.. said it almost felt in the skin and maybe it was a cyst. he said since it is very movable and doesnt feel surfaced in his neck (not movable) he didnt think it was anything to keep an eye on it if he is still worried go back and get it checked.
my question is how would the doctor know just by the feel of it that it wasnt nothing?