Lichen planus exanthematicus: Itchy exanthema with 0.1-0.2 cm large, slightly raised, partly isolated, but also aggregated to larger plaques, smooth, shiny, red (also erosive) papules.
erythema exsudativum multiforme. suddenly appeared, since 4 days existing, itchy, disseminated exanthema with cocard-like plaques. the skin changes appeared shortly after the beginning of antibiotic therapy for urinary tract infection. here the finding on the back of the hand. s. isomorphism (koebner phenomenon).
Candida granuloma: Recurrence at the forearm extensor side in a 28-year-old patient 1 year after complete regression of the granulomas under antifungal systemic therapy.
Dermatitis herpetiformis. multiple, disseminated standing, itchy, scratched excoriations on the right arm of a 15-year-old patient. the scratched excoriations are located at sites where grouped vesicles had appeared a few days before. overall, the disease has existed for several months and shows a chronically recurrent course.
Lichen planus exanthematicus. 32-year-old patient with this clinical picture, which developed within a few weeks and disseminated to the trunk and extremities. 0.1-0.2 cm large, roundish or polygonal, smooth, rough, livid-red, in places whitish papules with a shiny surface. There is distinct itching, but this has not yet led to visible scratching effects.
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
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