my son is 16 saw a oral surgeon yesterday for wisdom tooth consultation, while there he did a cancer test and found a small black dot in his ear,said to keep an eye on that for 6-8 weeks and then may need to be referrred to a specialist, so then i took him to see our GP and he said its a blackhead and removed the top of it,i looked at his ear today and its back ?? should this be maybe considered melanoma