Angiokeratoma of the glans penis. multiple, chronically stationary, 0.2-0.4 cm large, blue-red to brownish papules with partly smooth, partly scaly surface in the area of the corona glandis. these are congenital, circumscribed vascular ectasias.
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Aplasia cutis congenita. a sharply defined, whitish-yellowish, shallowly sunken, hairless area with atrophic, parchment-like skin surface, existing since birth. on incident light microscopy any follicular structures are missing.
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Aplasia cutis congenita. detail magnification: Classically specular, slightly sunken, light yellow macula with smooth surface. in the marginal area, in the lower left picture, a smaller area with tufted hairs is visible.
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Aplasia cutis congenita. general view: 1.5 x 1.2 cm in size, hairless, slightly sunken, yellowish-whitish area with shiny surface, existing since birth, unchanged for years except for size increase during physical growth.
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arteriitis temporalis. suddenly appeared, bizarrely configured, only moderately painful, large ulcerations covered with black crusts. prominent and on palpation strand-like indurated A. temporalis (right side). neither right nor left side positive flow signal over the temporal arteries.
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Atheroma: Sharply defined bulging, largely hairless tumour in the area of the capillitium.
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Atheroma Solitary, chronically stationary, sharply defined, approx. 3.0 x 1.5 cm, bulging elastic, largely hairless tumor in the area of the capillitium; no detectable central porus.
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Atheroma Chronic stationary, growing imperceptibly for more than 10 years, solitary, sharply defined, on the base well movable, indolent, plumply elastic, about 5.0 cm large, skin-colored, smooth lump.
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Atrichia congenita diffusa. detail enlargement: forehead and parietal region of an 18-month-old boy in whom eyebrows, eyelashes and scalp hair have been missing since birth. hair, sebaceous gland and follicle structures are clearly visible.
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Alopecia areata : cadaveric (comedone-like aspect) and exclamation mark hairs (see below right).
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Birt-Hogg-Dubé syndrome: Multiple, skin-coloured, flesh-coloured and whitish, partly waxy, relatively coarse, 2?5 mm large, hemispherical asymptomatic papules in the nose and cheek area of a 47-year-old female patient.
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Tufted hairs:Folliculitis decalvans: Scar plate with wicklike tufts of hair in the centre, also in the marginal area of the scarring (see also under Folliculitis decalvans).
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Cheilitis granulomatosa. Circumscribed permanent swelling of the upper lip.
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Cornu cutaneum: multiple plaques and nodules with exophytic growth and hyperkeratotic surface, localized on the actinic massive pre-damaged capillitium of an elderly patient.
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Culicosis. disseminated, irregularly configured, intensely itchy, intensely red, urticarial papules and papulo vesicles, appeared about 3-4 hours after an insect bite. the skin symptoms can persist for "weeks", itching!
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Cutis verticis gyrata: cerebriform (gyriform), symmetrical, asymptomatic folds and furrows of the scalp.
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Cutis verticis gyrata: Lateral profile of the capillitium of a 26-year-old patient (bodybuilder), who after extensive use of anabolic steroids developed these cerebriform thickenings, furrows and folds of the capillitium, which had been progressive for 6 months.
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Cutis verticis gyrata. cerebriforms (gyriforme), symmetrical, bulging, asymptomatic folds and furrows of the hairy scalp in a 29-year-old woman
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Cutis verticis gyrata: cerebriform thickenings, furrows and folds of the capillitium which have existed for years but are increasing; cause unknown; no familial occurrence.
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Dyskeratosis follicularis: Infestation of the palms of the hands; in central areas of the palm flat, common keratoses, at the ball of the thumb about 0.1-0.2 cm large, glassy papules.
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Dyskeratosis follicularis: 74-year-old woman. large , hyperkeratotic zones with reddish, partly macerated papules and firmly adhering, partly eroded, confluent keratoses on the capillitium and in the facial area preauricularly, existing since early childhood. the patient has a somewhat neglected appearance. the skin lesions have a foetal odour. the lesions increase with sweating or heat, especially in the warm season.
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Favus. solitary, acute, approx. 3.0 x 2.5 cm, acutely acute, approx. 3.0 x 2.5 cm in size, localized on the capillitium, sharply defined, plumply raised, clearly increased in consistency, white, rough, with yellow crusts, asymptomatic plaque in a 7-year-old boy. A slight mouse urine smell was noticed during the examination.
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folliculitis decalvans. low inflammatory, "burnt out" disease state. appearance of scarred alopecia with discrete, heart-shaped reddening around the marginal hair follicles. the present condition approaches the finding of "pseudopelade brocq".
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Folliculitis decalvans: extensive scarring inflammation with destruction of the hair follicles, typical tuft hair formation.
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Folliculitis decalvans. One year later, progressive scarring, obvious follicular inflammation.
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