AIN: perianally localized, less sympotmatic, extensive, whitish erosive plaque at 3 o'clock; secondary findings anal fissure at 6 o'clock (actual cause of the doctor's visit)
parapsoriasis en plaques, benign small hereditary form. 55-year-old patient with small spotted parapsoriasis en plaques (also called chronic superficial dermatitis). the distribution pattern (fingerprint dermatosis) in the longitudinal direction of the skin tension lines is almost diagnostic. occasionally slight itching (mostly in the winter months). in summer (after sea vacation) almost healed. histology is often not conclusive.
Scabies:explanatory presentation; chronic (existing for months) generalized, "eczematous", enormously itchy disease pattern with rough papules in the shape of a duct (here marked by black lines), encircling a chronically eczematized skin area without detectable duct structures.)
Purpura pigmentosa progressica (type: Purpura anularis teleangiectodes): brown-red anular, by confluence also serpiginous foci. no significant itching. sporadically also largely faded only shadowy spots
Kaposi's sarcoma. 37-year-old man infected with HIV has some circumscribed, symptomless, red plaques in the area of the nose. development within one month. conspicuous follicular accentuation in the lesions. smooth skin surface, no scaling. similar skin changes still exist on palmae and plantae as well as on the glans penis. development within one month.
Granuloma eosinophilicum faciei (Granuloma faciale): Unusual, flat, completely asymptomatic, existing for 2-3 years, slowly increasing in size, jagged, limited red plaque with central (artificial?) erosion and scaly crust formation; for course see following figure.
Primary cutaneous marginal zone lymphoma: 10 monthsago , first appearance of red, surface smooth papules and plaques in a 59-year-old patient; no scratch excoriations, no scaling, no pruritus.
rosacea ocular: chronic redness and swelling of the lower eyelid with inflammatory papules and pustules. inflammatory alteration of the lid margin. mild conjunctivitis
Keratosis actinica erythematous type: multiple red, rough, slightly painful papules and plaques on the bald head when stroking over them, continuously existing for years.
Nail psoriasis: unspecific nail dystrophy (which is also found in this way in chronic hand dermatitis), caused by paronychial infestation of the thumbs.
Erythema nodosum (affection of the upper and lower extremities): acute, multiple inflammatory, painful, clearly consistency increased plaques and nodules; accompanying arthritis of the right ankle joint.
Lupus erythematodes chronicus discoides:cutaneous chronic lupus erythematosus. years of course with circumscribed red scarring plaques (circle - with whitish atrophic area without follicular structure): arrow: dermal melanocytic nevus.
Vasculitis, leukocytoclastic (non-IgA-associated). multiple, petechial haemorrhages and haemorrhagic filled blisters in the area of the back of the hand and finger extensor sides. severe feeling of illness persists.
Special form: Mycosis fungoides follikulotrope: 10-year-old girl with generalized folliculotropic Mycosis fungoides. foudroyant course of the disease which made a stem cell transplantation necessary.
Nummular dermatitis: chronic, for 8 weeks existing, localized on the back of the hand, approx. 6 cm in size, reddish, raised, partly eroded, partly crusty plaques in a 47-year-old man; no evidence of psoriasis vulgaris or atopic diathesis.
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