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Query: UMLS:C0042109 (urticaria)
 6,569 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Solar urticaria is characterized by itching, erythema and wheeling immediately after exposure to radiation in the ultraviolet (UVB, UVA) and visible spectra. Although its exact mechanism remains unknown, evidence supports an immunologic pathogenesis. We describe an unusual patient with solar urticaria who had more severe involvement in skin irradiated with UVA light through white clothing. We propose that optical whiteners in clothing and detergents had absorbed UVA radiation, transforming it into visible light, which was responsible for the urticarial response.
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PMID:Solar urticaria enhanced through clothing. 982 87

Solar urticaria is an uncommon dermatological disease characterized by wheals developing within a few minutes after sun exposure and lasting a few hours. We describe a man in whom wheals developed on his trunk and arms more than 30 min after sun exposure and lasted more than 24 h. High doses of UVA reproduced lesions with histological features typical of urticaria. After 7 years, urticaria began to develop even in winter and without sun exposure. Our patient is unusual in that his wheals were delayed in onset and longlasting. The later association of idiopathic urticaria is an additional unusual feature.
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PMID:Persistent solar urticaria. A case report. 1040 25

Solar urticaria is an uncommon disorder characterized by pruritus, erythema and whealing commencing within minutes of exposure to ultraviolet (UV) and visible light, and generally resolves in a few hours. We describe a 28-year-old woman who developed pruritus and erythema 5 min after sun exposure while on tetracycline for treatment of perioral dermatitis. Phototesting elicited urticarial reactions in the UVA, UVB and visible spectra. Repeat phototesting after cessation of tetracycline was negative. This report documents the first case of solar urticaria induced by tetracycline.
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PMID:Drug-induced solar urticaria due to tetracycline. 1095 92

Abnormal photosensitivity syndromes form a significant and common group of skin diseases. They include primary (idiopathic) photodermatoses such as polymorphic light eruption (PLE), chronic actinic dermatitis (CAD), actinic prurigo, hydroa vacciniforme and solar urticaria, in addition to drug- and chemical-induced photosensitivity and photo-exacerbated dermatoses. They can be extremely disabling and difficult to diagnose. PLE, characterized by a recurrent pruritic papulo-vesicular eruption of affected skin within hours of sun exposure, is best managed by restriction of ultraviolet radiation (UVR) exposure and the use of high sun protection factor (SPF) sunscreens. If these measures are insufficient, prophylactic phototherapy with PUVA, broadband UVB or narrowband UVB (TL-01) for several weeks during spring may be necessary. CAD manifests as a dermatitis of chronically sun-exposed skin. Again, UVR exposure needs to be restricted; cyclosporine, azathioprine or PUVA may also be necessary. Actinic prurigo is characterized by the presence of excoriated papules and nodules on the face and limbs, most prominent and numerous distally. Actinic prurigo is managed again by restriction of UVR and the use of high SPF sunscreens; PUVA or broadband UVB therapy, or low doses of thalidomide may be necessary. Hydroa vacciniforme causes crops of discrete erythematous macules, 2 to 3mm in size, that evolve into blisters within a couple of days of sun exposure. Treatment for this rare disease is difficult; absorbent sunscreens and restricted UVR exposure may help. Solar urticaria is characterized by acute erythema and urticarial wealing after exposure to UVR. Treatment options for solar urticaria include non-sedating antihistamines such as fexofenadine and cetirizine; other options include absorbent sunscreens, restriction of UVR at the relevant wavelength, maintenance of a non-responsive state with natural or artificial light exposure and plasmapheresis. Industrial, cosmetic and therapeutic agents can induce exogenous drug- or chemical-induced photosensitivity. The clinical pattern is highly varied, depending on the agent; treatment is based on removal of the photosensitizer along with restriction of UVR exposure. Predominantly non-photosensitive dermatoses may also be exacerbated or precipitated by UVR; exposure to UVR should be reduced and sunscreens should be advocated, along with appropriate treatment of the underlying disease.
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PMID:Photosensitivity disorders: cause, effect and management. 1201 69

Solar urticaria is a well defined although uncommon photosensitivity disorder, and is said to be the underlying cause of chronic urticaria in approximately 0.5% cases. In contrast, solar angioedema is seldom reported. We describe two patients with postulated solar angioedema, associated with clinical and/or phototest features of solar urticaria. Recognition of solar provocation of angioedema has important consequences for patient management.
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PMID:Solar angioedema: an uncommonly recognized condition? 1614 33

Solar urticaria is an idiopathic, chronic and rare photodermatosis, characterized by the sudden onset of pruritic urticarial hives and plaques on the exposed areas of the skin, after a brief period of exposure to the natural sunlight or to an artificial light source. A Caucasian 27-year-old man presented with clinical features suggestive of solar urticaria was referred to our photodermatology unit, where phototesting confirmed the diagnosis of solar urticaria induced by visible light. As he was refractory to oral antihistamines and had slight improvement under UVA plus visible phototherapy, human high-dose intravenous immunoglobulin was administered, with an excellent clinical-sustained response.
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PMID:Solar urticaria treated successfully with intravenous high-dose immunoglobulin: a case report. 1900 Jan 92

Solar urticaria is a relatively rare immunoglobulin E-mediated photodermatosis that is caused by specific, yet diverse wavelengths of light. The history, epidemiology, clinical manifestations, histology, etiology/pathogenesis, differential diagnosis, treatment, course, and prognosis of solar urticaria are reviewed herein.
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PMID:Solar urticaria. 2039 18

Photoallergic dermatoses are skin lesions following sun exposure, characterized by activation of immunological mechanisms, involving photosensitizers and photoallergens that can cause photosensibilization in some individuals. In this group of disorders, photoallergic contact dermatitis should be accentuated. It manifests as contact allergic dermatitis on sun-exposed skin areas, following direct contact with photoallergens during UV exposure (predominantly UVA). Under influence of light, photosensitizers get activated, followed by fusion with cutaneous proteins which renders them to complete antigens, and consequential initiation of immunological mechanisms with resulting pathological skin lesions. The most common photoallergens are: sulfonamide antibiotics, phenothiazines, and halogenated salicylanilides. Photoallergic dermatoses are comprised of several disorders, although the causative photoallergen remains unknown (e.g. solar urticaria, polymorphous light eruption and hydroa vacciniforme). Solar urticaria is a rare, acute urticarial reaction on both sun-exposed and covered skin areas, which appears soon after exposure to sun or artificial lighting. Polymorphous light eruption is a relatively common polymorphous skin eruption, which usually appears in spring. Its pathogenesis is unknown, presumably photoallergic reaction. Hydroa vacciniforme is a rare photodermatosis of unknown etiology, which usually presents in summer-time. It is characterized by vesicobullous eruptions, with residual nonesthetic varioliform scarring.
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PMID:Allergic hypersensitivity skin reactions following sun exposure. 1913 19

A case of solar urticaria is presented, followed by a discussion of the clinical characteristics, pathophysiology, diagnosis, and management of this disease. Special emphasis is given to clinical pearls and pitfalls for the practicing allergist. Solar urticaria is a physical urticaria that can be difficult to diagnose and distinguish from other photodermatoses. There are some characteristic features that are important to remember when evaluating a patient with suspected solar urticaria. Testing can be difficult without the assistance of an experienced dermatologist because there are several different wavelengths of light that can lead to a patient's symptoms. Solar urticaria tends to be a chronic disease with a low 5-year resolution rate but can usually be effectively managed with multiple antihistamines.
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PMID:Solar urticaria. 1984 10

Solar urticaria is a rare immunoglobulin E-mediated photodermatosis characterized by the development of a pathognomic wheal and flare within minutes of photoexposure. A 26-year-old man presented with a history of sun-induced urticaria only in areas of pre-existing bruising, which we were able to replicate with monochromator testing. We were also able to demonstrate, by autologous in vitro studies, that a serum factor was responsible.
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PMID:Solar urticaria confined to areas of bruising. 2062 24


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