naevus anaemicus in periperous neurofibromatosis. coin-sized to palm-sized, almost jagged, white spot (here marked by arrows). this bizarre spot is visible with varying degrees of clarity. it is particularly noticeable when the surrounding area is reddened as a "negative contrast". after intensive rubbing of the spot, no reddening is visible in the area of the spot. .
erythema multiforme: suddenly appeared, for 2 days existing, itchy, flat, cocard-like plaque on the back of a 17-year-old woman. the skin change appeared shortly after the beginning of antibiotic therapy for urinary tract infection. further, similar skin changes appeared on other parts of the body.
Xanthomas, eruptive:disseminated, 0.1-0.3 cm large, yellow-brown, flat raised, superficially smooth and shiny, firm papules in dense seeding in a 54-year-old patient with known hyperlipoproteinemia type IV.
Parapsoriasis en plaques, grandiose: completely symptomless, sharply defined, disseminated spots and plaques; only when the skin is folded does a cigarette-paper-like pseudoatrophic architecture of the skin surface become visible (important diagnostic sign!).
Mastocytosis. type: Multiple mastocytomas Multiple, chronically stationary, approx. 0.6 x 0.7 cm large, localized on the entire integument, disseminated, round to oval, brown, smooth, little itchy spots and plaques in a 4-year-old boy.
Pemphigus vulgaris: multiple, chronic, since 3 years intermittent, symmetric, trunk-accentuated, easily injured, flaccid, 0.2-3.0 cm large, red spots, plaques and pallor, confluent to, weeping and crusty areas; extensive infestation of the oral mucosa and capillitium.
Tinea corporis in immunodeficiency. Marginal area of the lesion with broad, raised, scaly margins. Centrally located healing pattern with scaly plaques and papules between normalized skin areas.
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