Pseudomonas folliculitis, general view: truncal (especially lateral), itchy, maculopapular exanthema with follicularly bound red papules and partly pustules as well as scratch excoriations in a 59-year-old patient. The pathogen was detected, regular use of the indoor swimming pool is confirmed by anamnesis.
Granuloma anulare disseminatum. 0.2-1.0 cm in size, distributed over the décolleté and arms, standing alone or confluent, bluish to brownish, often anular but also homogeneously filled, non-scaling or only slightly scaling, asymptomatic spots or flat papules and plaques with lupoid infiltrate.
Pityriasis rubra pilaris (adult type) Detail: chronic recurrent course for years with phases of marked improvement and extensive recurrence (fig. in a relapse period). Characteristic for the disease are the boundaries of the plaques drawn with a sharp pencil, resulting in the so-called "nappes claires", sharply recessed zones of unaffected skin in the case of extensive infestation.
Nodular or nodular basal cell carcinoma. Relatively inconspicuous, sharply defined, completely asymptomatic, red nodule with a smooth, shiny surface (see detailed image and incident light image as inlet). The bizarre (tumor) vessels of the basal cell carcinoma become visible in incident light.
scabies. severely itching, disseminated, pinhead to lentil-sized, centrally eroded papules on the trunk and extremities. granulomas appear periumbilical and inguinal.
Acne inversa. severe clinical, therapy-resistant findings in a 52-year-old female patient. existing since the age of 20. keloid scars. furthermore inflammatory papules, nodules and extensive indurations.
Dermatitis herpetiformis: multiple, disseminated, eminently chronic, itchy, prickly, scratched excoriations, few vesicles (note: the vesicles must be sought in DhD).
Acne conglobata:symmetrically distributed, inflammatory papules and pustules with cystic transformation with a tendency to melt down, severe scarring and comedones. Mostly occurring in young people in the facial and upper body region. Chronic, often pressure-painful course.
Pityriasis lichenoides chronica: 19-year-old, otherwise healthy patient with a papular exanthema which has been present for 1 year and runs intermittently.
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