I had a dark spot on the bottom of my foot. Recently I noticed it "spread" to a size of about 2 cm with extremely irregular borders, different shades of brown and black, and became slightly raised and I was advised to see a dermatologist. She took a shave biopsy and the results came back as severely atypical so I have to now go back and get more tissue removed. My question is: would they be able to tell from the shave biopsy if it's melanoma or do they still need to test the new sample to make sure I'm in the clear? Any and all information is appreciated :)