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Immunologically Mediated (Idiopathic) Photodermatoses by Mind Map: Immunologically Mediated  (Idiopathic) Photodermatoses
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Immunologically Mediated (Idiopathic) Photodermatoses

Solar Urticaria

Action Spectrum

Type I Hypersensitivity Reaction

Clinical Presentation


Therefore, test for LE and EPP in patients with solar urticaria



Chronic Actinic Dermatitis (CAD)

3 Main Criteria:

Action Spectrum

DTH Type IV reaction (i.e., photoallergic)

Clinical Presentation


CAD in younger individuals infected with HIV has recently been described

Hydroa Vacciniforme (HV)

Rare, chronic photodermatosis

Clinical Presentation

Action Spectrum


Hydroa Vacciniforme-Like Lymphoma

While some researchers claim that HV can evolve into T-cell lymphoma, most insist that this is a disease distinct from the classical HV.

Actinic Prurigo (AP)

Two variants

Clinically different than PMLE:

Treatment: Thalidomide, Sun Glasses and Photoprotection, NB-UVB

Polymorphous Light Eruption (PMLE)

UVA is the most common action spectrum

Reproduction of lesions by photo-testing is of diagnostic value

Normal MED A/B

Skin phototypes I-IV


DTH response (Type IV Hypersensitivity) to a photo-induced antigen.

Clinical Presentation