Mastocytosis of the urticaria pigmentosa type: generalised infestation of the integument with disseminated brown spots, patches, papules and plaques, which in some places congregate to form larger areas
Incontinentia pigmenti, Bloch-Sulzberger type: a few weeks old girl with flat and streaky, inflammatory, in places hardly noticeable blistery skin changes.
Chronic light damage: poikiloderma after years of excessive UV exposure, including hyperpigmentation, depigmentation and numerous precanceroses of the actinic keratosis type.
Nevus from the back of an 84-year-old man who already had a melanoma 8 years ago. Noticed during the follow-up. The excision revealed a dysplastic nevus of the compund-type.
Atrophodermia idiopathica et progressiva. detail section: Chronic stationary, map-like spread, brownish spots in an 18-year-old woman. The existing skin changes developed within 2 years and originally had a rather reddish-livid colour.
Notalgia paraesthetica, general view: Infrascapular macula on the right side, measuring about 5 x 4 cm, burning, itchy, brownish macula without infiltration signs in a 63-year-old man with a secondary diagnosis of Scheuermann's disease.
Becker nevus: planar and spatter-like hyperpigmentation, focal hypertrichosis in the region of the lateral thoracic wall in young men; hardly visible at birth, postpubertal expression.
Lentigo maligna: a slow-growing, completely symptom-free spot that has been known for years; histologically, no invasiveness (transition to lentigo maligna melanoma) could be detected even in cut series.
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