Keloid. 20-year-old patient. acne vulgaris known since puberty. weeks to months after the development of acne papules, development of these papular or knotty elevations of the skin. on the trunk and upper arms of varying thickness, protruding above the surroundings, sharply set off, plate- or bulge-like, very rough, brown to brown-red, occasionally painful, smooth papules, plaques and nodules.
Tinea corporis. several, acutely appeared, oval, red, scaly, at the rim accentuated, towards the centre fading, itchy, flatly elevated, scaly plaques on the integument of a 12-year-old boy. the mother reported that the guinea pig's fur had also changed in a scaly way, a treatment of the animal was recommended
Lichen planus. chronically active, multiple, increasing, disseminated standing, partly confluent, first appearing about 6 months ago, mainly localized at the inner edge and back of the foot, 0.3-0.6 cm large, itchy, red, smooth, shiny papules in a 46-year-old woman. similar papules appeared on both inner wrist sides. Furthermore, a whitish, net-like pattern of the buccal mucosa of the mouth appeared.
Lymphomatoid papulosis: now misdiagnosed as ulcerative "pyoderma". As it was a multiple relapse of the same disease, the diagnosis is clinically confirmed. Previously painless nodular formation within 14 days with rapid (overnight) central necrosis.
Dermatosis, acute febrile neutrophils. following high fever in a 36-year-old woman, acutely occurring multiple, reddish-livid, succulent, pressure-dolent, infiltrated papules confluent to nodules and plaques. overall generalized picture with emphasis on extremities and trunk.
Malformations, syndromal vascular: Nevus flammeus (capillary malformation, no arterio-venous anastomoses) with soft tissue atrophy and pelvic obliquity, no pain symptoms.
Lymphoma, cutaneous T-cell lymphoma, large-cell, CD30-positive. general view: Multiple, chronically dynamic, increasing, non-displacing, confluent, covering a total area of 6 x 6 cm, hemispherical nodules with hard, central, red part and deep, crater-shaped ulceration in a 64-year-old patient.
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