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- Discussion:
    - Rare in upper extremity
    - Ulcerated skin lesion
         - cyst formation
         - pigmentation
         - elevated edge may appear pearly
         - may be subungual
    - Location:
         - dorsum of fingers to shoulder;
    - Treatment:
         - excision and radiation treatment;
         - 2-5 mm of normal appearing skin & subQ tissue is maintained around tumor