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The diagnosis of melanoma can be challenging, especially in metastatic lesions, due to the ability of melanoma cells to morphologically mimic carcinoma, sarcoma and even lymphoma cells. Moreover, melanomas can exhibit negative immunostaining for the melanoma markers HMB‐45 and MART‐1/Melan‐A, often used in the diagnosis of this tumor. KBA.62 is a recently described antibody that reacts with benign...
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