Pyoderma gangraenosum. multiple, chronically progressive, painful, large-area, blue-reddish nodules, partly with polycyclic ulcerations. characteristic is the necrotic ulcer with a painful marginal zone with walllike, undermined margins and dark red, livid erythematous border.
Psoriasis palmaris et plantaris (plaque-type): Patient with palmar plaque psoriasis, infestation of the backs of the hands and fioniasis with striped keratotic plaques.
Drug reaction, fixed. 3-day-old, roundish, sharply defined, reddish-brown plaque on the lower leg of a 20-year-old female patient with a diameter of about 4.0 cm.
Lichen planus verrucosus: multiple, chronically stationary, moderately sharply defined, itchy, whitish, rough papules and plaques on the backs of the hands. no scratch excoriations. reticular, white pattern of the oral mucosa.
Erythema anulare centrifugum. detail view: clearly borderline (well palpable border) and centrally fading plaque on the abdomen of a 54-year-old patient. underlying disease: M. Wegener.
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.
Chilblain lupus: reflected light microscopy. dilated, corkscrew-like vessels (arrows) on the dorsal side of the fignerendl song. s. clinical picture. encircles the anemic pressure point of the reflected light microscope
Eczema, atopic. chronic, recurrent itchy red spots and slightly raised, flat, rough red plaques on the back of the left hand, the back and the side edges of the fingers of an 8-month-old girl. Furthermore multiple, disseminated, partly crusty scratch excoriations and isolated rhagades are visible.
Mycosis fungoides (plaque stage): 72-year-old male (suction plaque stage of Mycosis fungoides); multiple, disseminated, 2.0-10.0 cm large, occasionally slightly itchy, only slightly increased in consistency, slightly scaly red, poikilodermatous plaques; conspicuous atrophy of the lesional skin (characteristics of the " Granulomatous slackskin")
Dermatomyositis, malignoma-associated, occurrence of punched-out ulcerations on the floor of indurated, livid erythema in a 67-year-old patient with bronchial carcinoma.
Erythema anulare centrifugum: Large-area, polycyclically limited, scaly erythema with an elevated wall on the upper and lower arm of a 64-year-old woman.
lichen (planus) verrucosus. multiple, chronically stationary, blurred, itchy, reddish, rough (wart-like) papules and plaques on the backs of the hands. no scratch excoriations. reticular, white pattern of the oral mucosa.
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.
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