13. Subjects must have slides available from stage III or stage IV melanoma. Paraffin blocks are preferable, but at a minimum, slides documenting melanoma by biopsy (including fine needle cytology) must be available for pathology review, and potential restaining/staining (see Section 7.4, Surgical Pathology Guidelines). Prior histologic demonstration of metastatic melanoma (either stage III or Stage IV) may be utilized if a repeat biopsy is not clinically needed to to establish eligibility.