Lichen planus (erosivus) mucosae: multiple, chronically active (since about 1 year), extensive, partly confluent, painful erosions as well as veil-like red (atropical) and white plaques (note: the findings must be distinguished from the exfoliation areata linguae).
Mycosis fungoides plaque stage; course of the disease since 6 years; disseminated, slightly to moderately itchy, clearly scaly, partly sharply and partly blurredly bordered red patches and plaques.
Hidradenitis suppurativa. chronic persistent brownish tinged rope ladder-like scarring in the left axilla of a 26-year-old man. strong nicotine abuse for 12 years. currently no fresh florid inflammations or fistulations.
Collagenosis, reactive perforating p apules: first appeared about 8 months ago, itchy papules with central depression and hyperkeratotic clot, no known underlying disease.
drug reaction fixe: red plaques, existing for several days, moderately sharply defined, little itchy. the peripheral areas are slightly leaking. tendency to blistering. DD: erysipelas (fever?, painful lymphadenitis?, leucocytosis?)
Pemphigoid, bullous. 5 weeks ago, acute, on the inner side of the right upper arm localized, disseminated, confluent, hemispherical, bulging, red, smooth, shiny, itchy blisters on a flat erythema in a 55 years old patient.
Scabies granulomatosa, detail section: Intensely itchy, reddish, solitary or grouped papules on the thorax of an 81-year-old resident who had been treated with lindane in a scabies epidemic.
Dyskeratosis follicularis: disseminated, chronically stationary, 0.1-0.2 cm in size, intermamillary localized, flatly elevated, moderately firm, non-itching, rough, red, scaly papules which unite at the top to form a blurred plaque; skin lesions have existed in varying degrees in this 53-year-old patient for several years.
Eyelid swelling: massive swelling of the eyelids in the case of known contact allergy to hair dye (here after application of hair dye containing para-phenylenediamine).
Angiokeratoma corporis diffusum: Periumbilical localized, disseminated, partly spatter-like, partly roundish 1-2 mm large, completely asymptomatic red spots and papules in a 22-year-old man.
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