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  Indian J Med Microbiol
 

Figure 12: Typical dermoscopic presentations of pityriasis rosea, lichen planus, psoriasis, and nummular dermatitis. (a) Pityriasis rosea. Peripheral collarette scaling (arrow) and peripheral dotted vessels with patchy distribution. (b) Lichen planus. White thick lines (arrows) also known as Wickham striae forming a network. (c) Psoriasis. Note the regular distribution of the dotted vessels (circle). (d) Nummular dermatitis. Patchy distribution of dotted vessels (circle) on the erythematous background without a collarette of scale

Figure 12: Typical dermoscopic presentations of pityriasis rosea, lichen planus, psoriasis, and nummular dermatitis. (a) Pityriasis rosea. Peripheral collarette scaling (arrow) and peripheral dotted vessels with patchy distribution. (b) Lichen planus. White thick lines (arrows) also known as Wickham striae forming a network. (c) Psoriasis. Note the regular distribution of the dotted vessels (circle). (d) Nummular dermatitis. Patchy distribution of dotted vessels (circle) on the erythematous background without a collarette of scale