| Clinical Information | ||
| An 82-year-old man presented with a 1-cm raised dermal nodule on the right foot that has been present for unknown duration. There was no history of melanoma or any other pigmented skin lesion. Biopsied skin showed a well-circumscribed white, firm dermal nodule. | ||
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| Low magnification. | ||
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| Higher magnification. | ||
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| HMB-45: Negative. | ||
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| Melan-A: Negative. | ||
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| S-100 protein: Weakly positive. | ||
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| MITF: Strongly positive nuclear stain. | ||