Dry keratotic plaque type Chronically active, intermittent plaques, which have existed for more than 20 years, especially on the palm of the hand, multiple, rough, partly reddish, scaly, blurred spots, plaques and rhagades in a 54-year-old man.
Lichen planus verrucosus. solitary, chronically stationary, for months unchanged, very itchy, 5.0 cm large, rough, red, verrucous plaques on the lower leg. a highly chronic course over years is to be expected.
Psoriasis palmaris et plantaris. dry keratotic plaque type. non pretreated psoriasis palmaris. in a 42-year-old man, these sharply defined, rough, hyperkeratotic plaques, which have existed permanently for months, appear in the area of the right palm.
Tinea pedum (moccasin type). general view: For about 13 years non-healing redness and scaling, partly with severe itching, in the area of the right foot in a 30-year-old female patient. sharply defined, marginal scaling erythema, pustular formation, swelling of the foot with limited walking ability.
Chronicdyskeratosis follicularis, also affecting the Rima ani (see detailed picture), intertriginous, whitish and red-brownish sooty, blurred, macerated, superficially rough, clearly increased in consistency, itchy and unpleasantly smelling plaques.
Parapsoriasis en plaques large: asymptomatic , moderately sharply defined, disseminated patches and easily eliminated plaques on the trunk and extremities.
Lichen sclerosus extragenitaler: white plaque with a shiny surface, existing for several months, completely without symptoms, slowly progressive; differential diagnosis is to exclude a morphea (histological confirmation).
lichen sclerosus of the penis: distinct phimosis in a 4-year-old boy. the lichen sclerosus can still be diagnosed at the anterior fold of the prepuce. here a whitish, sclerotic ring is visible. a retraction of the foreskin was not possible anymore. the rapid circumcision is highly recommended.
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