Naevus flammeus lateralis: Sharply limited livid-blueish spot with increasing deepening of the colour in the area of the lateral upper lip and philtrum.
Psoriasis seborrhoeic type: for several months, symmetrical, only slightly elevated, homogeneously filled red-yellow, slightly accentuated, scaly plaques, which have remained in the same place for several months, with red lips.
Erythema infectiosum: in cases of moderate feeling of illness, flat, butterfly-shaped redness and swelling of the cheeks; furthermore, exanthema of the extremities
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)
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.
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.
Basal cell carcinoma, nodular, sharply defined, shiny, smooth tumor interspersed with bizarre "tumor vessels", which are particularly prominent in this nodular basal cell carcinoma and play an important role in the diagnosis.
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