the short answer is not necessarily. Here’s a paragraph describing ….
The MART-1/melan-A antigen is specific for the melanocyte lineage, found in normal skin, the retina, and melanocytes, but not in other normal tissues. It is thus useful as a marker for melanocytic tumors (melanomas) with the caveat that it is normally found in benign nevi as well.
So it would appear it is a sign but not definitive whether it is or isn’t melanoma. The full derm path report will give the determination.
Good luck!
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