1,721,111 research outputs found
Le dermatiti delle palpebre
No full textPurpose: To determine the most important causes of contact allergic reactions on the eyes and eyelids. Patients and Methods: This retrospective study provides an analysis of patch-test results obtained in a population of 215 patients suffering from conjunctivitis and/or dermatitis on the eyelids, out of a total population of 2035 patients investigated for contact allergy between February 2003 and April 2005. If indicated, also prick testing with a latex extract was performed. Results: The majority of the patients with eye and/ or eyelid involvement presented with a positive reaction to at least one of the contact allergens tested. The main sensitisation sources were cosmetics (fragrance components, preservatives, emulsifiers, hair-care and nail products), metals (nickel), topical pharmaceutical products (antibiotics, corticosteroids), rubber derivatives, resins (e.g. epoxy resin), and plants. Also latex-allergy (immediate-type sensitivity presenting as a contacturticaria syndrome) was a frequent finding in such patients. Conclusion: Contact allergy is a common cause of eyelid dermatitis in particular and the allergens may reach the skin in many different ways
Conctact dermatitis : some important topics
No full textAllergic contact dermatitis (ACD) is a type IV delayed hypersensitivity reaction. The gold standard for diagnosis is patch testing. The prevalence of positive patch tests in referred patients with suspected ACD ranges from 27 to 95.6%. The relationship between ACD and atopic dermatitis (AD) is complicated with conflicting reports of prevalence in the literature; however, in a patient with dermatitis not responding to traditional therapies, or with new areas of involvement, ACD should be considered as part of the work-up
Le dermatiti croniche del padiglione e del condotto auricolare esterno
No full textChronic otitis externa is a common condition, which is usually successfully treated by topical medications and toilet. In cases that persist despite conventional treatment, a diagnosis of allergic otitis externa should be considered. Sensitization to otological medications (secondary contact otitis) is not uncommon. Topical aminoglycosides are the most common sensitizers although many components of topical preparations can cause sensitization. Patients who may have developed allergic otitis externa should undergo patch testing. Otolaryngologists and dermatologits should consider using topical antibiotics with a low allergenic potential and avoiding neomycin when treating patients with otitis externa. Primary contact otitis may occur to metals used in earrings and also to hearing aid moulds. Treatment of both primary and secondary contact otitis consists of identifying the allergen, avoiding further contact and use of simple preparations avoiding common sensitizers
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