Dermatitis, Photoallergic

**Definition:** A delayed hypersensitivity involving the reaction between sunlight or other radiant energy source and a chemical substance to which the individual has been previously exposed and sensitized. It manifests as a papulovesicular, eczematous, or exudative dermatitis occurring chiefly on the light-exposed areas of the skin.

**Tree numbers:** - C17.800.174.255.100.600 - C17.800.600.325 - C17.800.815.255.100.600 - C20.543.418.150.600

**Synonyms:** - Photosensitive Contact Dermatitis - Dermatitis, Contact, Photosensitive - Dermatitis, Photocontact - Photoallergic Contact Dermatitis - Dermatitis, Contact, Photoallergic