Malasseziafolliculitis: disseminated, follicle-bound, inflammatory, 0.5-3 mm papules and papulopustules on the back of a 32-year-old female patient; frequent, even long-term, antibiotic therapy due to bacterial cystitis.
Lyme borreliosis: picture of acrodermatitis chroica atrophicans. flat, partly livid, partly lilac erythema in the area of the entire upper body after a tick bite about 14 months ago. serological evidence of a borrelia infection. stage III of Lyme borreliosis.
Boils. 38-year-old patient with recurrent boils. 2.5 x 2.0 cm large, spontaneously formed, pressure-marked, flat raised lump with yellow necrotic tip and scaly crown.
Atheroma Chronic stationary, growing imperceptibly for more than 10 years, solitary, sharply defined, on the base well movable, indolent, plumply elastic, about 5.0 cm large, skin-colored, smooth lump.
Circumscribed scleroderma (plaque type): for about 2 years first occurring, since then progressive in size, large, brown, locally confluent, moderately indurated stains and plaques in the area of the trunk in a 28-year-old female patient.
Lichen nitidus. chronic stationary, partly grouped, also linearly arranged (Koebner phenomenon), non-itching, non follicular, 0.1 cm large, white, smooth, round papules in a 32-year-old male.
Acne conglobata. multiple comedones in the area of the back of a 53-year-old patient with A. conglobata since the age of 14. no papules or pustules. irregular skin surface with pronounced scarring. coin-sized, deep scar (almost central in the picture) after incision of an abscess.
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