Erythema multiforme: typical picture with different stages of development of the efflorescences: besides fresh 0.2-0.3 cm large flat papules, further developed large plaques with discrete cockade structure.
Wickham's drawing: The stripes in each efflorescence appear as broad, white differently configured (also branched) lines; characteristic is the livid discoloration of the lichen planus (dermoscopic picture) .
Lichen planus classic type: for several months, red, itchy, polygonal, partially confluent, smooth, shiny papules that have remained in place for several months
Graft-versus-Host-Disease: brownish pigmented, partly also scleroderma-like skin changes in the area of the forearm and hand, approx. 6 months after bone marrow transplantation.
Acrodermatitis continua suppurativa, typical clinical picture. 1 year of recurrent course with progressive destruction of the fingernails. Subungual pus puddles on the right index finger.
Mycobacterioses, atypical. 3 months old, developing from a red papule, firm, covered with whitish scales, free of scales at the edges, red-brown, completely painless nodule. culturally proven infection by M. marinum.
Hand eczema atopic: long-term atopic eczema with variable course; the skin on both backs of the hands has existed with varying intensity for 1.5 years.
Klippel-Trénaunay syndrome: extensive vascular malformation with extensive nevus flammeus affecting the trunk and both arms. no evidence of soft tissue hypertrophy so far. no AV fistulas. here detailed picture of the back of the right hand
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