actinic dermatitis


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pho·to·der·ma·ti·tis

(fō'tō-der'mă-tī'tis),
Dermatitis caused or elicited by exposure to sunlight; may be phototoxic or photoallergic, and can also result from topical application, ingestion, inhalation, or injection of mediating phototoxic or photoallergic material.
See also: photosensitization.
Synonym(s): actinic dermatitis
[photo- + G. derma, skin, + -itis, inflammation]

actinic dermatitis

a skin inflammation or rash resulting from exposure to sunlight, x-ray, or atomic particle radiation. Chronic or recurrent actinic dermatitis can predispose to skin cancer. See also actinic keratosis.

chronic actinic dermatitis

A photosensitive dermopathy that occurs in all races, which primarily affects elderly men, and may be linked to endogenous eczema, photoallergic or allergic contact dermatitis, drug photosensitivity, polymorphic light eruption or, rarely, HIV infection.

Chronic actinic dermatitis, key features
• Reduction in the minimal erythema dose to UVA, UVB and/or visible light;
• Persistent eczematous eruption that predominantly affects sun-exposed skin, but which may extend to covered areas;
• Histopathologic changes consistent with chronic eczema ± cutaneous lymphoma-like changes.

pho·to·der·ma·ti·tis

(fō'tō-dĕr'mă-tī'tis)
Dermatitis caused or elicited by exposure to sunlight; may be phototoxic or photoallergic, and can result from topical application, ingestion, inhalation, or injection of mediating phototoxic or photoallergic material.
See also: photosensitization
Synonym(s): actinic dermatitis, actinodermatitis.
[photo- + G. derma, skin, + -itis, inflammation]
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ACTINIC DERMATITIS

actinic dermatitis

A chronic red or eczematous rash, usually on the face or exposed skin surfaces, that typically results from exposure and sensitization to ultraviolet rays. Adults over age 50 may be affected. See: illustration Synonym: photosensitivity dermatitis
See also: dermatitis
actinic dermatitis ultraviolet- or sunlight-induced dermatitis

actinic

producing chemical action.

actinic dermatitis
that produced by exposure to actinic radiation, such as that from the sun, ultraviolet waves, or x- or gamma radiation. Called also dermatitis actinica.
actinic radiation
said of rays of light beyond the violet end of the spectrum.