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.
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.
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).
Pityriasis lichenoides chronica: 19-year-old, otherwise healthy patient with a papular exanthema on the trunk which has been present for 1 year and runs intermittently. Hardly any itching. No other symptoms.
Haemangioma targetoides haemosiderotic: dermatoscopic image with sinosidal vascular dilatations. black spots correspond to thrombosed vascular convolutes. image from the collection of Dr. med. Michael Hambardzumyan.
Dermatosis, acute febrile neutrophils (Sweet Syndrome): suddenly appearing inflammatory, succulent, livid red papules that have conflued into larger and plaques, combined with fever and feeling of illness.
Pityriasis lichenoides chronica. unusually extensive maculopapular exanthema, existing since several weeks. distinct itching. linear arrangement of the efflorescences in places.
Malasseziafolliculitis: follicle-bound, 2-6 mm large, inflammatory papules and papulopustules on the back of a 53-year-old female patient; secondary findings: melanocytic naevi and isolated seborrheic keratoses.
Pityriasis lichenoides chronica: 19-year-old, otherwise healthy patient with a papular exanthema on the trunk which has been present for 1 year and runs intermittently. Hardly any itching. No other symptoms.
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