Tinea corporis: Acute, intergluteally localized, symmetrically arranged, flat, oval, emphasized at the rim, peripherally progressing, fading towards the centre, flatly elevated, red, rough, blurred, scaly plaque in an 80 year old woman.
lichen planus. detail enlargement: interface dermatitis with sawtooth-like acanthosis. characteristic features are "blurring" of the intercellular boundaries, hypergranulosis, orthohyperkeratosis and epidermotropic lymphocytic infiltrate. distinct vacuolar degeneration of the basal keratinocytes
Cold urticaria. solitary, acute, on the right arm localized, approx. 5.0 x 7.0 cm measuring, flat, sharply defined, flatly elevated, skin-coloured, consistency increased, strongly itching wheals in a 20-year-old student. Comparable skin lesions were noticed on the whole integument during swimming. These disappeared after a few hours.
Dermatitis contact allergic: Acute, itchy, sharply defined, infiltrated erythema (plaque) on the face and neck and multiple, partly confluent vesicles in the décolleté area in a 43-year-old female patient after application of a skin care cream.
porphyria cutanea tarda. shown here is a detailed picture of the hand with an overall generalized, chronically dynamic infection on the integument of a 55-year-old man. on the right hand, hemorrhagic blisters appear a few hours old next to older, crusty erosions and flat atrophic, somewhat depigmented scars. the blisters appear after banal everyday traumas. the blistering is combined with hyperpigmentation in the face and neck (melanodermic porphyria brugsch) and hypertrichosis lanuginosa of the zygomatic arch.
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