Social Hygiene Symposium 2005
نویسنده
چکیده
Photodermatoses are a group of heterogeneous disorders with diverse clinical manifestations and complex aetiology. They can be classified into five general categories including (1) photodermatoses which are secondary to exogenous agents, such as phototoxic and photoallergic reactions, (2) photoexacerbated dermatoses, (3) photodermatoses which are idiopathic such as polymorphic light eruption (PMLE), actinic prurigo (AP), hydroa vacciniforme, chronic actinic dermatitis (CAD), and solar urticaria (SU), (4) photodermatoses which are secondary to endogenous agents mainly the porphyrias, and (5) genodermatoses. The initial step in evaluating a photosensitive patient is a detailed and directed personal and family history as well as physical examination. History should include time of onset of symptoms, duration, drug or herbs intake, travel history, exposure to cosmetics and aroma therapy. Physical examination should focus on distribution Date: 12 November, 2005 Venue: Public Health Laboratory Centre, Hong Kong Organiser: Social Hygiene Service, Public Health Service Branch, Centre for Health Protection, Department of Health of the lesion, morphology, pattern and sign of underlying causes such as lupus erythematosus. Investigations will be directed by history and physical examination. Skin biopsies, autoimmune markers, porphyrin profiles, phototesting and photopatch tests may be required to confirm the diagnosis.
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