Psoriasis vulgaris chronic active plaque type: long term pre-existing psoriasis, now relapsing activity (medication?) with disseminated, small psoriatic lesions as a sign of "relapsing activity".
Acne, steroid acne. reflected light microscopy without contact medium (section: jaw angle region in a 30-year-old bodybuilder): multiple, hypertrophic sebaceous gland follicles with central, keratotic plugs within the ostia, hypertrichosis, transparent horny layer due to corticosteroid-induced hypokeratosis, parallel striated distortion of the skin field lines due to increased transepidermal water loss as well as an ectatic subepidermal vascular network without point capillaries (years of abusus of corticosteroids and anabolic steroids).
Lichen planus (classic type): for several months persistent, red, itchy, polygonal, partly confluent, red, smooth, shiny (in places anular) papules on the trunk.
Lichen planus exanthematicus: for several months persistent, itchy, generalized, dense rash with emphasis on the trunk and extremities (face not affected). 0.1-0.2 cm large, rounded, brown to brown-red papules with a smooth surface appear as single florescence. Here confluence to larger plaques.
Lichen planus exanthematicus: for 3 months persistent, itchy, generalized, dense rash with emphasis on the trunk and extremities (face not affected); on the cheek mucosa there are pinhead-sized whitish papules; as an individual florescence a 0.1-0.2 cm large, rounded, brown to brown-red papule with a smooth surface appears.
scabies. vein-shaped, rough papules with massive, especially nocturnal itching. larger plaques only in case of eczematization. predilection sites: interdigital folds of hands and feet, areolas. head and neck are free.
Pustulosis, sterile eosinophilous. multiple, chronic, recurrent for 6 months, disseminated, 0.1-0.2 cm large, highly itchy pustules that appear on flat plaques. blood eosinophilia and histoeosinophilia are detectable.
Eczema atopic: severe, generalized, severely itchy atopic eczema existing since earliest childhood with disseminated, eroded and ulcerated (scratched) reddish papules and plaques; the "dryness of the integument" with keratosis pilaris-like accentuation of the follicles is clearly visible.
Sweet syndrome: reddish-livid, succulent, pressure-dolent, infiltrated, solitary and partly papules confluent to plaques over the spinal column in a 47-year-old female patient. 1 week before the onset of the disease intake of cotrimoxazole due to a urinary tract infection. temperatures > 38 °C
Malasseziafolliculitis, detail magnification: In the picture, almost centrally located, a follicle-bound, inflammatory papule, approx. 6 x 4 mm in size, is impressive.
Granuloma anulare perforans. detail enlargement: solitary or densely standing, skin-coloured to reddish, rough, smooth, peripherally extending, centrally sinking, partly necrotic, non-itching papules on the back of a 40-year-old man.
Sweet syndrome: reddish-livid, succulent, pressure-dolent, infiltrated, solitary and partly papules confluent to plaques, on the right side of the body in a 47-year-old female patient. 1 week before the onset of the disease intake of Cotrimoxazol due to a urinary tract infection. temperatures > 38 °C.
Mucinosis follicularis type III: Chronic, often generalized, slightly itchy form in middle-aged to older adults, with disseminated, 0.1 cm large, skin-colored, red follicular papules on the trunk and extremities; possible precursor stage of folliculotropic mycosis fungoides (DD; type II of mucinosis follicularis; DD: malasseziafolliculitis).
Dermatitis, hypereosinophilic. partly papular, partly plaque-like, considerably itchy exanthema of disseminated, 0.3-1.5 cm large, red, smooth papules which have merged into an anular plaque formation on the buttocks.
Transitory acantholytic dermatosis (M.Grover): a few weeks old, only moderately pruritic clinical picture with disseminated papules and also papulo vesicles; Nikolski phenomenon negative.
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