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21 sie 2024 · Photoallergic contact dermatitis (PACD) is a delayed hypersensitivity reaction to allergens only in the presence of ultraviolet radiation in sunlight. Photopatch testing (PhotoPT) is necessary to confirm the diagnosis of PACD. There are few published studies of PhotoPT in North America.
Photopatch testing aids the diagnosis of suspected contact and/or photocontact sunscreen allergies that may be contributing to photosensitivity. It may also help to guide sunscreen choice for the patient.
13 paź 2020 · Photopatch testing is a procedure that combines patch testing with UV irradiation. It is primarily indicated to study photoallergic contact dermatitis, but it can also contribute to establish a correct diagnosis of any exposed site dermatitis or systemic drug photosensitivity.
The present guideline summarizes all aspects of patch testing for the diagnosis of contact allergy in patients suspected of suffering, or having been suffering, from allergic contact dermatitis or other delayed-type hypersensitivity skin and mucosal conditions.
21 sie 2024 · Photopatch testing (PhotoPT) is necessary to confirm the diagnosis of PACD. There are few published studies of PhotoPT in North America. Objective. To summarise the results of patients photopatch tested by members of the North American Contact Dermatitis Group (NACDG), 2009–2020. Methods.
Sunscreen agents, especially benzophenones, were the most common photoallergens. Other common diagnoses included ACD, PMLE and CAD. Photopatch testing is an important tool for differentiating these conditions.
Photopatch testing is performed when the patient's history and the physical examination suggest a photosensitivity disorder in which various exogenous chemical substances may be involved.
