WIKD
My Dryfus's Nipple became enlarged just about the size of a pea and hard, it was just the nipple and none of the surrounding tissue. Within 2-3 days of it being noticed I had it biopsied and it turned out to be a mast cell tumur. Dryfus had it removed through surgury 4 days ago. I say better safe than sorry, if it is worrying you have it byopsied. Good luck.