Drug reaction, fixed: suddenly appeared, for 3 days existing, erythematous, isolated, roundish, sharply defined plaques with central blisters of about 4-5 cm diameter on the abdomen of a 20-year-old female patient; probably the skin changes are due to the intake of paracetamol.
Striae cutis distensae, initially blue-reddish (Striae rubrae), later whitish, differently long and wide, jagged, parallel or diverging atrophic stripes with slightly sunken and thinned, transversely folded, smooth skin.
psoriasis vulgaris. plaque psoriasis. the 54-year-old patient has been suffering from this non-itching disease for about 30 years. he has given up treatment in the meantime. fully developed, untreated psoriasis vulgaris with 5.0-7.0 cm large, coarse plaques covered by firmly adhering scaly deposits, which give the plaques their white-grey colour. the plaques have a reddish edge (here the actual red colour of the plaques is not covered by scales).
Urticaria pigmentosa: Close-up: about 0.5-1.0 cm in size, disseminated, oval or round, brownish-red spots; "Darier phenomenon" can be triggered; here visible by the red colour in places of slight mechanical irritation.
Kaposi sarcoma epidemic or HIV-induced: Disseminated flat reddish-brown, surface smooth, symptomless plaques, characteristically located in the tension lines of the skin.
Tinea corporis: unusually elongated, large-area tinea corporis, pretreated for several months with a potent corticosteroid steroid externum; distinct itching on interruption of steroid therapy (existing for 8 months).
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