Photoallergic contact dermatitis

Photoallergic contact dermatitis is uncommon.

BACKGROUND Despite the enormous increase in sunscreen use, allergic contact (AC) and photoallergic (PA) reactions to ultraviolet (UV) filters are considered rare. OBJECTIVES To analyse the data from 2715 patients who underwent photopatch testing at St John's Institute of Dermatology during the period 1983-98. METHODS A retrospective analysis of all positive photopatch test episodes was unde...

Action spectrum for etofenamate photoallergic contact dermatitis.

Topical photoallergic contact dermatitis (PACD) is investigated by photopatch testing, and a consensus European methodology exists, which advises the use of ultraviolet (UV)A as the irradiation source (1). However, for most agents, the action spectrum for PACD has not been defined. We sought to determine the action spectrum for topical photocontact allergy to the non-steroidal antiinflammatory ...

Photoallergic contact dermatitis from benzydamine presenting mainly as lip dermatitis.

BACKGROUND Benzydamine, a non-steroidal anti-inflammatory drug (NSAID) in use for more than four decades, has been reported to cause photosensitivity. OBJECTIVES To study the results of photopatch testing to benzydamine and the clinical features of the dermatitis during a 3-year period (2006-2008). PATIENTS AND METHODS During this period, 74 patients with photodermatoses were photopatch tes...

Photoallergic contact dermatitis to 8-methoxypsoralen in Ficus carica.

BACKGROUND Photocontact dermatitis to Ficus carica is induced by furocoumarins present in sap. These substances are generally considered to cause phototoxic reactions. OBJECTIVES We conducted a patch test and histopathological study of patients with phytophoto contact dermatitis from the fig tree to evaluate the mechanism underlying the photoreaction. PATIENTS AND METHODS Patch and photopat...

Photoallergic contact dermatitis caused by benzophenones in magazine inks.