Basal cell carcinoma, nodular: Development of a basal cell carcinoma on a (congenital) sebaceous nevus. The carcinomatous transformation took place chronically insidiously without any symptoms. Only a recurring crust formation with intermediate weeping led to the pioneering biopsy.
Dermatitis chronic actinic (type light-provoked atopic eczema). general view: Disseminated, scratched papules and plaques, nodular in places, as well as blurred, large-area, reddened, severely itching erythema on the face of a 51-year-old female patient with atopic eczema existing since birth. the skin changes can be provoked by sunlight and photopatch testing.
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!).
Balanitis simplex: chronic recurrent balanitis of unknown aetiology since several years. 43 years old patient. blurred erosive red plaques. broad synechia between preputial leaf and glans penis. remark: circumcision is strongly recommended for prophylactic reasons!
Necrobiosis lipoidica. necrobiosis lipoidica slowly "growing" for several years. large, rather discrete scarring in the centre. yellow-brownish plaque at the edges.
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.
unilateral circumscribed scleroderma: unilateral "segmental" circumscribed scleroderma. the lightly pigmented large-area plaques have existed for about 5 years. no increasing "growth" in the last few months.
Dermatitis contact allergic: 53 years old, still working bricklayer. chronic eczema with disseminated red, partly skin-coloured papules, which in places have conflated to blurred, lichenified plaques. furthermore discrete, laminar, fine-lamellar scaling as well as multiple partly encrusted erosions. distinct itching. proven chromate sensitisation.
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