I was diagnosed 2006 with .55, clark's level 2, with lateral and deep margins involved. Upper left arm. About a month ago I noticed a lump on the left side of my head above my ear. It is completely painless. I was visiting my rheumatologist today (rheumatoid arthritis) and showed it to him. He said it is large, at least 1 cm and that he thought I should have it biopsied. I called my derm. and will see her Wednesday morning. Any thoughts? Similar situations?