Airborne Contact Dermatitis: Retroauricular infection: This pattern distinguishes ACD from photoallergic eczema, where the "shadow area of the auricle" remains free.
Papillomatosis confluens et reticularis. confluent, brownish hyperpigmented papules in the neck region of a 31-year-old patient, existing for several years, blurred, flatly elevated, consistency-multiplied papules. velvety sensation on palpation. histologically there is acanthosis with distinct papillomatosis and strong plexus-like orthohyperkeratosis. PAS staining negative.
Lupus erythematosus, subacute-cutaneous. detail magnification: Multiple, solitary or confluent, small spots to large areas, sharply defined, anular and gyrated erythema of neck and face of a 68-year-old female patient, partly covered with yellowish crusts.
Airborne Contact Dermatitis: Chronic, massively itching and burning, lichenified dermatitis, which is limited to the freely carried skin areas. Lower boundary only blurred (leaking eczema foci), a typical feature of contact allergic eczema. Retroauricular region is also affected.
Dermatitis contact allergic: Recurrence with previously known sensitization by para-phenylenediamine; now renewed hair coloration with acute exacerbation of the "former" dermatitic plaques.
Eczema, atopic. brownish, dry, scaly plaques on lichenified ground in the neck area of a 24-year-old female patient. infestation of the large joint bends as well as seizure-like, tormenting itching.
Lupus erythematodes tumidus: Plaques existing for 3 months, localized on the back and face, irregularly distributed, sharply defined, 0.2-3.0 cm in size, flatly raised, clearly increased in consistency, slightly sensitive, red, smooth plaques; no significant scaling.
Lupus erythematosus, subacute-cutaneous. general view: multiple, solitary or confluent, small to large foci, sharply defined, partly homogeneous circular, partly also anular and gyrated, plaques with scales and crusts, trunk and extremities. 68-year-old female patient.
Dermatitis chronic actinic: Chronic laminar eczema reaction which is essentially limited to the exposed skin areas Typical of chronic actinic dermatitis and thus distinguishable from a toxic light reaction (type acute solar dermatitis) is the blurred transition (eczematous scattering reactions) from lesional to healthy skin.
eczema atopic in dark skin): here as partial manifestation of a generalized intrinsic atopic eczema. chronic brown-grey, blurred lichenoid plaques. distinct itching.
Neck fistula and cyst, lateral. solitary, chronically in-patient, 2.5 x 1.5 cm in size, clearly increased in consistency, red, rough plaque with an opening for the fistula. occasional slight oozing.
Dermatitis contact allergic: chronic itchy dermatitis with blurred reddish-brown plaques, HV has been shown to be caused by multiple hair dyeings with a hair dye containing para-phenylenediamine.
Lupus erythematosus, subacute-cutaneous. detail magnification: solitary or confluent, small to flat, sharply defined, annular and gyrated, partly scaly plaques in a 68-year-old woman.
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