TLDR A man had a rare pigmented nodule on his scalp that developed from birthmarks.
A 30-year-old man presented with a bluish-grey nodule on his scalp, which had developed over 6 months from a skin-colored lump originating from two alopecic plaques present since birth. Dermoscopy revealed homogenous blue-white pigmentation, white dots, and a brown-red area. Histopathological examination identified epithelioid cell nests in collagen stroma and spindle-shaped dermal melanocytes among collagen fibers.
4 citations,
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