Our Corgi (Fox) will be 3 later this month.  He has always been in excellent health, tons energy, great appetite.  Two weeks ago we noticed a wart like lump on his nose, just where the black part starts to blend with the upper nose.  Initially it was smaller than a tic-tac, now it's a little larger.  It is under the skin.  

I took him to the vet two days ago.  She took his temp (normal), and pressed a glass slide over the bump to remove some cells for lab.   She didn't know definitively what it is.  It is NOT a tick and is pushing up from under the nose skin.  We're going back in two weeks for a core biopsy. 

Anyone had this go on?  Thoughts?  A pic will follow as it uploads.........Thanks!