Acrocyanosis: Diffuse, reddish-livid skin discolouration at reduced temperature and doughy swelling; delayed filling of the vessel after anaemia by finger pressure (iris diaphragm phenomenon).
Lichen sclerosus et atrophicus. extensive extragenital 'infestation with typical "leathery" changes of the skin surface due to a distinct orthohyperkeratosis in the fallen areas. the areas are brightly discolored due to orhtohyperkeratosis and the underlying "edema zone". thus the natural color of the area is lost.
Lichen sclerosus of the penis: several discrete, veil-like, little sharply defined, whitish spots and plaques; dysesthetic discomfort during sexual intercourse.
Lichen sclerosus of the vulva: verrucous lichen sclerosus with synecchia between small and large labia, extensive atrophy of the small labia with narrowing of the introitus vaginae.
Hand-foot-mouth disease: numerous, acute, painful, polygonal vesicles with a red courtyard; unspecific flu-like prodromas lasting about 2 weeks before.
Vitiligo: spots depigmented with varying degrees of intensity. vertical arrow above: focus in advanced uniform repigmentation. horizontal arrow: uniform but still incomplete repigmentation. vertical arrow below: new roundish focus in older already (incomplete) repigmented area.
Lichen sclerosus extragenitaler (and genital): small and large, partly sharp and partly blurred bordered spots and plaques with parchment-like surface; in the area of both popliteal fossa coarse lamellar scaling.
Psoriasis of the nails: circumscribed damage to the nail root with alteration of the cuticle, marked by arrows and crossbars. Oval circles around an onycholysis area. The marked crossbars denote so-called Beau-Reilsche transverse furrows.
psoriasis of the nails. severe onychodystrophy with wave-like transverse ligament with simultaneous psoriatic attack of the nail wall (paronychium). completely missing eponychium (cuticle). partially crumbly nail matrix on the nail surface as well as on the distal edge. no pain symptoms.
Keratosis pilaris syndrome. Inflammatory follicularly bound papules in the area of the hairline of a 41-year-old female patient, with multiple, whitish, atrophic areas in between with loss of the follicular ostia.
Psoriasis of the nails. lifting of the integrity of the nail plate, instead crumbly nail material. thickening of the nail plate in places as well as splintering in the distal area.
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