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Melanocytic markers. Melanoma in situ (a) highlighted by immunostains of S100 (b), MART-1 (c) and MITF (d). e, f Ki-67 immunostain in a melanoma with a brisk tumor infiltrating lymphocytic response, highlighting the difficulty in interpreting lineage of Ki-67-positive cells. g, h Double Ki-67 and MART-1 immunostains of melanoma, highlighting cell proliferation specifically in melanocytic lineages.
