Ilven: yellowish striated, sharply defined papules along the blashkolines in a 4-year-old boy; 6 months before occurred with mild itching. therapy: caring externals if necessary.
Mucinosis follicularis: itchy, disseminated, follicular, well-defined, pointed, skin-coloured papules with firmly adhering hyperkeratosis on the back and the lateral thoracic parts; clinical picture of a "grating iron skin".
Connective tissue nevus, lumbosacral. 30-year-old woman, in whom these changes had been present since earliest childhood. Clinically, in the sacral region, sharply defined, very firm, partly rubbery, slightly raised above the skin level, cobblestone-like arranged, whitish papules and plaques with smooth surface are found. Localization and clinic are characteristic for the diagnosis. Secondary findings are angiofibromas in the face.
Type I Neurofibromatosis, peripheral type or classic cutaneous form. Since puberty slowly increasing formation of these soft, skin-coloured or slightly brownish, painless papules and nodules. Several café-au-lait spots.
Mucinosis follicularis: acute clinical picture developed after heavy sweating; multiple, generalised, 0.1 cm large, itchy, skin-coloured, pointed conical, rough papules bound to follicles.
Lichen myxoedematosus: Lichenoids, clearly increased in consistency, skin-coloured to yellowish-reddish papules in the area of the upper back and the extensor sides of the extremities; accompanying pruritus.
Acne comedonica. numerous comedones on the right shoulder blade of a 17-year-old patient. 3 years ago recurrent papules and pustules in the face as well as comedones in the area shown.
Acne vulgaris (overview): recurrent, multiple, disseminated standing retention cysts of 0.3-1.2 cm size on the back of a 38-year-old mansince adolescence; multiple black comedones (blackheads) are also present.
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