Psoriasis guttata: acutely and de novo appeared, 0.1-2.0 cm large, reddish, rough papules and plaques with fine-lamellar scaling on the trunk and extremities in a 24-year-old woman. A feverish streptococcal angina preceded this. After healing of the initially manifested symptoms, a longstanding chronic, intermittent course of psoriasis followed.
Pemphigoid gestationis. itchy, since 4 weeks existing exanthema with multiple, generalized, symmetric, truncated, large red plaques with isolated, bulging blisters. picture reminds of an erythema exsudativum multiforme.
AIN. Anal dysplasia. Large, hyperkeratotic area with smaller satellite lesions. The surface is granular and shows different areas of keratinization. Histologically, there was a grade 2 intraepithelial neoplasia.
Lichen planus verrucosus: a hypertrophic lichen planus with pseudoepitheliomatous epithelial hypertrophy and scarring that has been present for several years.
Primary cutaneous follicular center lymphoma: chronically active, increasing for 12 months, localized on the trunk and upper extremities, disseminated, 0.3-0.7 cm in size, asymptomatic, hemispherical, firm, smooth, red papules and nodes.
Pityriasis rosea: Collerette scaling: For Pityriasis rosea pathognomonic form of scaling with exactly one ring of fine, slightly raised, whitish scaling about 1-2mm indented from the lateral edge of the reddish plaque.
Note: this form of "keratolytic" desquamation results from the repulsion of superficial, parakeratotic horn lamellae.
Tinea barbae. scaly, blurred, itchy erythema (incipient plaques) on the cheek and upper lip. erythema areas are sparsely interspersed with follicular papules and pustules.
Nummulardermatitis (nummular/microbial eczema): Chronically active, 8-week-old, approx. 6 cm large, brownish, raised, partly eroded, partly crusty plaque on the back of the foot in a 54-year-old man. The surrounding skin is reddened.
Eczema, dyshidrotic: Chronic recurrent, slightly infiltrated, sharply defined red plaque on the right foot; reddish-brown, sometimes scaly, dot-shaped, older white scaly papules appear in places where water clear vesicles were previously present.
lupus erythematosus acute-cutaneous: clinical picture known for several years, occurring within 14 days and still with relapsing course at the time of admission. in contrast to the anular pattern on the trunk, irregular, blurred red plaques. in the current relapsing phase fatigue and exhaustion. ANA 1:160; anti-Ro/SSA antibodies positive. DIF: LE - typical.
Nummular dermatitis: Extensive nummular lesions that havebeen present for several months with blurred, considerably itchy papules and confluent plaques. No hinwesi for psoriasis. No evidence of atopic diathesis.
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.
Sebaceous nevus: 25-year-old man; the reddish-brownish plaque, interspersed with whitish papules, was completely painless since birth; the excision was performed without complications and without spindle; a sebaceous nevus could be histologically confirmed.
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