Tinea manuum. flat, borderline, little scaling flock with single follicular papules in the area of the back of the hand and forearm, little itching, for several months.
Hidroa vacciniformia. large, subepidermal, water-clear, occasionally also hemorrhagic blisters on the left back of the hand and wrist of a 10-year-old patient. hours before sun exposure.
Erythema nodosum (affection of the upper and lower extremities): acute, multiple inflammatory, painful, clearly consistency increased plaques and nodules; accompanying arthritis of the right ankle joint.
Vasculitis, leukocytoclastic (non-IgA-associated). multiple, petechial haemorrhages and haemorrhagic filled blisters in the area of the back of the hand and finger extensor sides. severe feeling of illness persists.
Nummular dermatitis: chronic, for 8 weeks existing, localized on the back of the hand, approx. 6 cm in size, reddish, raised, partly eroded, partly crusty plaques in a 47-year-old man; no evidence of psoriasis vulgaris or atopic diathesis.
Angiokeratoma circumscriptum. 20-year-old female patient with a lesion composed of several types of efflorescence. The skin lesions present have existed since birth. The blue-black parts have gradually developed over the past five years. In addition to two-dimensional red spots (upper part), red papules (lower part) and blue-black bumped plaques with a smooth, shiny surface are found. Soft, spongy consistency in the centre.
Pruritus brachioradialer: frequently occurring unpleasantly prickly itching on the extensor forearms (including upper arms + back of the hand). more pronounced after UV exposure. significantly better after application of "cool packs". known chronic cervical spine syndrome.
Chilblain lupus. early stage with livid-red, surface smooth, painful plaques. clinical picture reminiscent of chilblain (frostbite lupus). no other systemic signs of lupus erythematosus.
Leishmaniasis, cutaneous. 12 weeks old, 1.5 x 1.2 cm in size, slowly progressing in size, solitary, slightly pressure dolent, red, rough lump with ulceration in the center. History of previous vacation in Egypt. No systemic complaints.
Scleromyxoedema: Multiple 0.1-0.2 cm large, roundish, non follicular papules with a smooth, shiny surface; their linear arrangement is typical, which is also found in lichen myxödematosus.
Striae cutis distensae. 13-year-old girl with striped red spots on upper arms, thighs and buttocks, rapidly growing within the last six months. linear, horizontally oriented, striped red spots. on delicate palpation a slight depression of the surface can be detected. thus flat, striped atrophy is present.
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