Purpura pigmentosa progressiva: aetiologically unexplained (medication?) pronounced clinical picture that has been changing for several months with symmetrically distributed, disseminated, non-itching, yellow-brown, spots (detailed picture).
Dermatitis herpetiformis: multiple, disseminated, eminently chronic, itchy, prickly, scratched excoriations, few vesicles (note: the vesicles must be sought in DhD).
Acute allergic contact dermatitis: acute, itchy, blurred dermatitis of the right forearm that appeared for the first time a few days ago; considerable itching; formation of blisters.
Dermatomyositis. Gottron papules in a 72-year-old woman. Smaller, striated, reddish-livid papules appear, which confluent in the region of the end phalanges to form flat plaques. Strongly pronounced nail fold capillaries on dig. III and V. The Keining sign was strongly positive in the clinical examination.
Gottron's sign in dermatomyositis. 72-year-old patient with dermatomyositis known for 1 year. striped red, scaly papules and plaques over the base joints of the fingers. flat, deep red, painful and slightly scaly plaques on the enphalanges, also directly periungual. distinct hyperkeratotic nail folds.
Squamous cell carcinoma of the skin: a red, very firm, painless lump on actinic damaged skin that has existed for at least 2 years, initially slowly increasing, but in the last 2 months growing significantly faster, 2.5 x 1.5 cm in size; central, firmly adhering horn plug that can be moved against the base.
Medicinal reaction, fixed. acute, solitary, 1.0 cm large, round to oval, initially deep red, later blue to brown-red, sharply defined, succulent, itchy or also slightly painful spot. bullous transformation in the centre.
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