Lichen simplex chronicus indark skin. several lesions with 0.1-0.2 cm large, marginally disseminated, firm brown-black papules confluent in the centre of the lesions. permanent itching.
Mycosis fungoides: Plaque stage. 53-year-old man with multiple, disseminated, 1.0-5.0 cm large, in places also large-area, moderately itchy, distinctly increased consistency, red rough plaques. development over 4 years. initial findings.
Contact dermatitis toxic: Detail enlargement: Strong hyperkeratosis on reddened skin as well as isolated small rhagades and erosions on the right foot of a 46-year-old patient.
Keratosis areolae mammae naeviformis: Chronic stationary plaque in a 45-year-old man, unchanged for years, limited to the nipple and areola, moderately increased in consistency, without symptoms, brown, rough (warty) plaque.
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.
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).
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).
Erythema anulare centrifugum. 53-year-old patient with skin changes for several months. anular or garland-shaped, linear erythema enclosing a skin-coloured area. the erythema moves 0.3?0.5 cm per day, so that new formations are constantly forming.
Drug exanthema, maculo-papular. multiple, acute, since 3 days generalized, disseminated, dense, blurred, isolated, 0.2-10.0 cm large, isolated and aggregated to homogeneous areas, itchy, red, smooth spots. appearing 4 days after taking antibiotics because of a flu-like infection.
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