Necrobiosis lipoidica: confluent, reddish-brownish, reddish-brownish, centrally clearly atrophic, bruan-red plaques that have been present for about 3-4 years, gradually increasing in size, sharply defined, confluent, reddish-brownish, centrally clearly atrophic, bruan-red plaques, increase in consistency over the entire plaque.
Verrucae vulgares (detailed picture): flat wart bed with subungual infiltration. This constellation results in considerable therapeutic complications. It is important to exclude a verrucous carcinoma.
Papillomatosis cutis lymphostatica: massive findings with papillomatous growths on the thighs; massive chronic lymphedema with deep folding of the skin above the heel region.
Urticaria pigmentosa: Close-up: about 0.5-1.0 cm in size, disseminated, oval or round, brownish-red spots; "Darier phenomenon" can be triggered; here visible by the red colour in places of slight mechanical irritation.
sarcoidosis: anular or circine chronic sarcoidosis of the skin. existing for about 5 years. onset with papules the size of a pinhead (see middle of the cheek) with appositional growth and central healing. no detectable systemic involvement. findings: asymptomatic, brown to brown-red, borderline, centrally atrophic, little infiltrated, confluent lesions in the face in several places.
Kaposi sarcoma epidemic or HIV-induced: Disseminated flat reddish-brown, surface smooth, symptomless plaques, characteristically located in the tension lines of the skin.
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).
Purpura eczematide-like purpura: non-symptomatic (no itching) "eczema-like" disease that has been recurrent for months in a completely healthy patient (no history of medication).
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