Acne excoriée des jeunes filles. multiple, symmetrically distributed, increasing, inflammatory, red papules and pustules as well as comedones and small scars in a 27-year-old woman. originally there were significantly fewer papules and pustules. for about 4 years the patient has tried to express the papules and pustules 2-3 times/week for cosmetic reasons.
Lupus erythematodes chronicus discoides: large, sharply defined plaque with a central, clearly sunken (atrophy of the subcutaneous fatty tissue), poikilodermatic scar; the peripheral zones continue to show inflammatory activity.
Acrodermatitis papulosa eruptiva infantilis; acute exanthema with disseminated lichenoid papules confluent in the centre of the cheeks in hepatitis B; slight fever with gastrointestinal symptoms (diarrhoea); lymphadenopathy.
Elastoidosis cutanea nodularis et cystica: multiple, chronic inpatient, 0.4 - 1.2 cm large, symptomless, soft, yellowish papules and nodules; black comedones in the temporal region. 72-year-old man with massive chronic UV exposure over decades.
Stage IIrosacea (rosacea papulopustulosa) Stage II rosacea with single, inflammatory papules and pustules on the forehead, nose, cheeks and chin in a 34-year-old female patient.
Basal cell carcinoma nodular: Irregularly configured, hardly painful, borderline red nodule (here the clinical suspicion of a basal cell carcinoma can be raised: nodular structure, shiny surface, telangiectasia); extensive decay of the tumor parenchyma in the center of the nodule.
Dyskeratosis follicularis. reflected light microscopy: section of a lesion on the neck. yellowish-white keratin plaques (orthohyperkeratosis) and areas with ball-shaped, ectatic central capillaries (acantholysis area).
Lymphoepithelioma-like carcinoma: unspectacular clinical picture with glassy appearing solid nodules. Fig. taken from Oliveira CC et al. (2018) Lymphoepithelioma-like carcinoma of the skin. An Bras Dermatol 93:256-258.
Sebaceous gland hyperplasia: Soft, yellowish papules which have existed for years, slowly increasing in size; in the middle of the picture 2 sebaceous cysts which are the maximum form of a sebaceous gland hyperplasia.
Xanthogranuloma, necrobiotic with paraproteinemia. 62-year-old female patient shows several clearly infiltrated plaques in the periorbital region, interspersed with yellowish-brown nodular parts.
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