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Psoriasis skin and nail lesions. a: Typical plaque psoriasis on extensor surface of lower limbs. b: Psoriatic plaque on scalp and under the hairline. c: Psoriatic nail lesions, demonstrating onycholysis and pitting. d: Erythrodermic psoriasis

Psoriasis skin and nail lesions. a: Typical plaque psoriasis on
extensor surface of lower limbs. b: Psoriatic plaque on scalp and under the hairline. c: Psoriatic nail lesions, demonstrating onycholysis and pitting. d: Erythrodermic psoriasis