Sarcoidosis: anular or circulatory chronic sarcoidosis of the skin. persisting for several years. onset with small symptomless papules with continuous appositional growth and central healing. no detectable systemic involvement.
Erythema anulare centrifugum: Characteristic single cell lesion with peripherally progressive plaque, which flattens centrally and is only recognizable here as a non raised red spot.
Psoriasis inversa: 69-year-old woman. 6 months at presentation. no manifestations of psoriasis present on the remaining integument. family history but positive: son with known psoriasis vulgaris.
Bilateral naevus verrucosus in an infant. No symptoms. Psoriasiform aspect of the plaques running in the Blaschko lines, scattered, reddish, slightly infiltrated, scaly.
keloid. large, brown to brown-red, very rough, smooth nodes with a jagged edge structure. not painful to the touch, with significant pressure considerable pain. postoperative condition after excision of several acne nodes in the sternal region.
Nummular Dermatitis: General view: For several months persistent, strongly itching, solitary or confluent, coin-sized, infiltrated papules and plaques on the back of a 48-year-old patient.
Pityriasis rubra pilaris (adult type) Detail: chronic recurrent course for years with phases of marked improvement and extensive recurrence (fig. in a relapse period). Characteristic for the disease are the boundaries of the plaques drawn with a sharp pencil, resulting in the so-called "nappes claires", sharply recessed zones of unaffected skin in the case of extensive infestation.
eczema, photoallergic. 51-year-old female patient. generalized skin disease with 0.2-0.4 cm large, red, slightly scaly papules (see lower margin of the picture), which have merged into flat plaques on the exposed skin areas. sudden spread. appearance within a few weeks after infection, intake of antibiotics as well as later exposure to sunlight.
scabies. severely itching, disseminated, pinhead to lentil-sized, centrally eroded papules on the trunk and extremities. granulomas appear periumbilical and inguinal.
Keloid. chronically stationary, acne-typically distributed clinical picture. multiple, in the area of the seborrhoeic zones of the trunk localized, irregularly distributed, 0.3-1.5 cm large, skin-coloured, flatly elevated, smooth papules and plaques of moderately firm consistency.
Impetigo contagiosa. acutely occurring, persistent for 5 weeks, increasing despite external therapy, localized on the trunk and right arm of an 18-month-old boy, red, erosive, rough papules and plaques, partly covered with crusts. Similar skin lesions were found on the face and all extremities.
eczema, atopic (nummular atopic eczema). findings persisting since the 1st month of life in a now 22-month-old boy. sudden exacerbation with severe itching since 4 weeks. generalized clinical picture with red, scaly and weeping plaques up to 10 cm in diameter. red papules of 0.1-0.3 cm in size disseminated in the apparently free skin areas (see right forearm and face).
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