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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 a relatively rare dermatosis. In reported cases, skin lesions appeared soon after sunlight irradiation, usually within a few minutes, and consisted of a wheal localized to the exposed area with a surrounding flare. The case presented herein is quite different from the others in its clinical manifestation. The time required for the formation of the wheal was far longer and there was neither surrounding flare nor pseudopodia. Also, the degree of local edema was directly proportional to the length of exposure time, up to three hours. A diagnosis of solar urticaria had not previously been made in this patient because he did not show wheal formation except after unusually long exposure.
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PMID:Solar urticaria. Report of an unusual case. 46 99

Solar urticaria was treated by means of repeated exposures of the skin to fluorescent lamps or natural sunlight. Repeated exposures over a period of hours induce a state of tolerance in the skin so that urticaria fails to develop. The state of tolerance can be maintained with regular daily exposures, and treatment can lead to complete symptomatic relief. Determination of the action spectrum for urticaria is advisable in order to choose the correct fluorescent lamp for treatment.
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PMID:Solar urticaria treatment by inducing tolerance to artificial radiation and natural light. 90 Sep 66

Idiopathic polymorphous light eruptions (PLE) are photodermatites due to an as yet unidentified photosensitizing agent. Benign estival PLE is the most frequent form: the face is spared, and as soon as the patient has acquired a slight tan the eruption will no longer occur. Juvenile spring eruption affects the free border of the helix and may be regarded as a localized and mild form of estival PLE. Polymorphous light eruptions appear as lesions of the face which may resemble lupus erythematosus; photobiological exploration reproduces the lesions experimentally in 70% of the cases; immunohistochemistry studies are in favour of an immunological mechanism. Solar urticaria is a rare physical urticaria started by UVA, UVB and/or visible light: tolerance to sunlight can be induced by repeated exposures, but it does not last. Hydroa vacciniform is a rare PLE in children with leaves smallpox-like scars; photobiological exploration reproduces the lesions with high doses of UVA applied for 3 consecutive days. The remanent photosensitivity syndrome is characterized by an extreme photosensitivity which may be very disabling, preventing the patient to go outdoors; photo-allergological exploration discloses numerous positive patch-tests or photopatch-tests to various allergens, but the role played by these allergens in the occurrence of photosensitivity remains unclear. The syndrome probably results from an exogenous photosensitivity accident that has not regressed after exclusion of the presumably responsible photoallergens. Many treatments tested for these PLE seem to be effective, but they have not yet been controlled by double-blind trials.
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PMID:[Idiopathic light eruption]. 152 46

The acute idiopathic photodermatoses are more common in females and comprise polymorphic light eruption, actinic prurigo, hydroa vacciniforme, and solar urticaria. Polymorphic light eruption occurs considerably more frequently than the others and while precise pathogenic mechanisms are still unclear, increasing evidence suggests an immunological basis for this condition. Although clinically distinct, actinic prurigo may be a variant of polymorphic light eruption, whereas solar urticaria and possibly hydroa vacciniforme are distinct entities, the former representing a type I hypersensitivity response. Polymorphic light eruption is characterized by a recurrent cutaneous reaction to ultraviolet (UV) exposure occurring after a delay of several hours that consists of pruritic erythematous papules, vesicles, or plaques on usually only some exposed sites and resolves without scarring over about a week. Actinic prurigo is differentiated from polymorphic light eruption by childhood onset and more persistent and excoriated lesions present both on sun-exposed and, to a lesser extent, non-exposed sites. Hydroa vacciniform is a rare disorder that also begins in childhood, and is characterized by recurrent crops of vesicles on sun-exposed skin and subsequent vacciniforme scarring. Solar urticaria is an uncommon condition that usually begins in the third or fourth decade and is differentiated from the other acute idiopathic photodermatoses by rapid onset of urticarial lesions within minutes of UV exposure and resolution within 1 to 2 hours.
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PMID:The acute idiopathic photodermatoses. 220 41

Solar urticaria is a rare photodermatosis, but it is extremely incapacitating and therapy is usually ineffective. Three patients who took a daily dose of 240 mg terfenadine were able to be normally exposed to sunlight. This efficacy was confirmed by photobiological tests. The minimal dose necessary to induce urticaria was increased at least three times. These results confirming recently published ones. Terfenadine at 240 mg per day seems to be the treatment of choice for solar urticaria because of its efficacy and excellent tolerance-especially as there is no sedative effect.
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PMID:[Treatment of solar urticaria: advantage of terfenadine]. 256 1

Solar urticaria is a rare disorder in which patients develop urticarial lesions after exposure to light from the sun or other sources. The etiology is unknown: some cases appear to be mediated by IgE, but other mechanisms may ultimately be found to be more significant. This disease typically persists for years, but may resolve spontaneously. Although fatalities have not yet been reported, episodes of solar urticaria have produced near-fatal accidents. At best, treatment is difficult, but some techniques have afforded some patients substantial or total relief, even if only temporarily.
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PMID:Solar urticaria. 395 95

Solar urticaria, to the best of our knowledge, has not been previously reported in association with cystic fibrosis. We present a 10-year-old atopic child with cystic fibrosis who developed hives in areas exposed to sunlight.
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PMID:Solar urticaria in cystic fibrosis. 686 17

Solar urticaria, an uncommon photosensitivity disorder, may be disabling for affected patients, especially those who react after short exposures to artificial or natural light. The spectrodermograph, a newly developed instrument, permits rapid, accurate determination of the action spectrum of solar urticaria. It consists of a xenon arc lamp with an emission dispersed into used to establish the wavelengths responsible for solar urticaria in 12 patients during the past four years. Knowledge of the wavelengths responsible for producing the urticarial reaction has implications for selecting appropriate therapy. The clinical course of these patients is also reviewed.
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PMID:Solar urticaria. Clinical features and wavelength dependence. 706 79

Solar urticaria is a rare disorder characterized by erythema, pruritus, and urticaria occurring minutes after exposure to a light source. It is one of several photosensitive conditions, such as phototoxic reaction, photoallergic reaction, systemic lupus erythematosus, and porphyria, that can cause photosensitivity. Herein we report a case of solar urticaria and review the rational approaches to its diagnosis and treatment.
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PMID:Solar urticaria: a case report. 864 60

Solar urticaria is characterized by itching weals that occur a few minutes after exposure to visible or ultraviolet light. The symptoms may sometimes restrict normal daily life. Treatment is difficult in more severe cases. We describe one patient with solar urticaria who was successfully treated with cyclosporin A. The patient had first been treated with antihistamine, PUVA and chloroquine phosphate without effect. Cyclosporin was given in a dose of 4.5 mg/kg body weight/day. Phototesting before, during and after treatment showed a decreased light sensitivity to UVA, UVB and visible light during cyclosporin treatment compared with phototesting before therapy. The patient could be out in the sun for at least 1 h with minimal urticaria during cyclosporin therapy compared with only a few minutes previously. However, 1-2 weeks after cyclosporin therapy was discontinued, skin symptoms returned. Cyclosporin therapy is a possible treatment in severe cases of solar urticaria where other treatments have failed, especially in countries where treatment is necessary only for a few months during summer.
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PMID:Cyclosporin A therapy for severe solar urticaria. 936 Nov 30


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