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Figure 4: Showing a patient of acanthosis nigricans with +2 patch and +1 photopatch positivity to 4-phenylenediamine base. Biopsy (H and E stain, 10X) showed acanthosis, mild papillomatosis, and increased basal melanin. Dermoscopy—accentuated normal pseudoreticular pattern with irregular blotches, scaling

Figure 4: Showing a patient of acanthosis nigricans with +2 patch and +1 photopatch positivity to 4-phenylenediamine base. Biopsy (H and E stain, 10X) showed acanthosis, mild papillomatosis, and increased basal melanin. Dermoscopy—accentuated normal pseudoreticular pattern with irregular blotches, scaling