Granuloma anulare disseminatum: partial manifestation on the forearm. non-painful, non-itching, disseminated, large-area plaques that appeared on the trunk and extremities of a 65-year-old patient. no diabetes mellitus. no other systemic diseases known.
Naevus depigmentosus: congenital harmless localized pigment disorder, no surface progression. characteristic is, in contrast to the naevus anaemicus, the "calm" smooth-edged border of the spot.
Psoriasis arthropathica: single (only on the thumb), complete, crumbly onychodystrophy (psoriatic crumb nail) Massive swelling and redness of the entire thumb, infestation of the joints in the ray (so-called sausage fingers).
acrodermatitis continua suppurativa. persistent, therapy-resistant changes of the right thumb of a 68-year-old woman since 3 years. initially a suppuration at the medial nail bed was observed which became more and more severe and finally led to nail extraction. 2 further nail extractions followed after 2 recurrences. the nail matrix is distally detached and altogether dystrophic. in the distal region there is a smaller weeping plaque. secondary findings are a melanonychia striata as a central, dark, longitudinal stripe at the nail.
Mycobacterioses, atypical. 3 months old, developing from a red papule, firm, covered with whitish scales, free of scales at the edges, red-brown, completely painless nodule. culturally proven infection by M. marinum.
Dermatomyositis (V-sign): Characteristic cutaneous symptoms of the backs of hands and fingers, almost proving the diagnosis of "collagenosis", with reddish-livid papules arranged in stripes, which merge to form flat plaques in the area of the end phalanges. Painful nail fold keratoses with parungual erythema are sometimes seen. Such papules arranged on the stretching side are also found in SLE and mixed collagenosis, rarely once in lichen planus.
Lichen simplex chronicus: 14x7.0 large, itchy, blurred plaque with rough surface on the right forearm of a 32-year-old female patient; the papule structure of the lesion is distinctly skin-coloured and occasionally scratched.
Lichen planus verrucosus. 1 year old, constantly itchy, blurred, firm plaque with a wart-like surface structure. The clinical findings are to be distinguished from those of a Lichen simplex chronicus (Vidal ).
Hand eczema atopic: long-term atopic eczema with variable course; the skin on both backs of the hands has existed with varying intensity for 1.5 years.
Leprosy lepromatosa: advanced findings with numerous, almost symmetrically distributed, asymptomatic papules and nodules, no accompanying inflammatory reaction.
Swimming pool granuloma, detail magnification: 2 cm diameter, red-livid, discretely scaling node at the base joint of the left index finger of a 60-year-old aquarium owner.
Candida granuloma. chronic recurrent nodular cutaneous-subcutaneously localized, deep-reaching, livid inflammatory foci on the wrist of an immunocompromised, 28-year-old patient. abundant C. albicans detectable in the smear. development of new nodules despite oral antimycotic medication. partial healing leaving post-inflammatory pigmentation.
Amyloidosis systemic: flat light brown, symptomless spots and plaques on both backs of the hands; recurrent fresh bleeding in the case of banal trauma.
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