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Case report A 50-year-old male presented with an ill-defined hyperpigmented macule on the left pointer finger (Figure 1). The lesion was reportedly first evident one year prior to presentation. Clinically, the lesion was asymmetrical. Notably, there was central hypopigmentation and obliteration of acral architecture. Differential diagnosis included acral nevus, tinea nigra, subcorneal bleeding, exogenous pigmentation, […]