Urticaria pigmentosa adultorum: Classical form of cutaneous mastocytosis (excess of mast cells in the skin) with multiple red patches and wheals (positive Darier sign, due to the friction of the trousers) clearly protruding in the buttock area, and light brown in the adjacent lumbar area, 0.1-0.3 cm in size.
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
Urticaria pigmentosa: Generalized, macular, livid-red to brownish, partly confluent "exanthem-like" clinical picture on the trunk of a 41-year-old woman.
Dermatitis, phototoxic. general view (stage of healing): Strip-shaped, dark brown hyperpigmentations, partly with healing blisters and crusts on the left-sided trunk of a 30-year-old female patient. Initially painful, itchy blisters on reddened skin along the contact with the triggering plant parts existed after plant contact and subsequent UV exposure.
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.
Mastocytosis diffuse of the skin: Disseminated large-area mastocytosis of the skin (type Ia). In addition to the conspicuous yellow-brown spots and plaques, the apparently unaffected skin is slushy thickened, in places also with protruding follicular structures. The occurrence of larger blisters after banal trauma has been reported time and again. No systemic involvement detectable.
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.
Urticaria pigmentosa: general view: about 0.5-1.0cm large, disseminated, oval or round, brownish-red spots. only when rubbed, increased redness of the spots with accompanying itching. also in warm showers or baths increased redness and clearly palpable elevation of the lesions. remark: control image 1 year later.
Purpura pigmentosa progressiva. acute episode with dense distribution of punctiform, red, non-push-off spots (bleeding). in addition, extensive brown coloration (hemosiderin deposition) in the area of the lower legs.
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