PMC9035387_01
Multiple hyperpigmented maculopapules on the scalp (A). Dermoscopic images showed whitish scar-like centre surrounded by brown streaks (B) (30x). Hyperkeratosis, deposits of amyloid in the dermal papillae and melanophages within the papillary dermis (C) (H&E, 100x). Staining of the eosinophilic material in the papillary dermis (D) (Congo red, 100x).
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Physical examination revealed discrete, 1- to 3-mm, flat-topped, brownish papules over the crown and vertex area of the scalp (Figure 1A). Dermoscopic examination revealed whitish scar-like centre surrounded by brownish dots or brown fine streaks radiating from the centre, located in a background hair and scalp alteration of typical AGA (Figure 1B). Histologically, deposition of pink amorphous material was identified in the papillary dermis with scattered melanophages in the expanded dermal papillae (Figure 1C). The deposits were highlighted by Congo red staining (Figure 1D).