Persistent light reaction L57.8

Subtype of chronic actinic dermatitis (CAD), which develops from a long-standing sensitivity to light and is triggered by pre-existing sensitization without further photoallergen administration in the presence of possibly low light exposure. Decrease of MED in the UVA and UVB range.

Unclear, mostly primarily photosensitization with persistence of the photoallergen (e.g. olaquindox). Later on the skin symptoms may be triggered and maintained by low light doses.

Occurs mainly in middle-aged and older men.

Areas of the body exposed to light, especially the forehead, cheeks, auricles, neck, throat, back of the hands.

Initially acute dermatitis, later recurrent course with transition to a chronic stage. Inflamed, red to livid, pad-like thickened, furrowed, scaly, occasionally weeping skin changes. Considerable lichenification, often excruciating itching. The skin lesions are clearly demarcated from the unexposed skin, whereby this transition is not sharply defined in lines, but irregularly loosened. The skin changes persist for months after low UV exposure, can subside in winter and exacerbate again in spring after brief UV exposure. The maximum variant of chronic actinic dermatitis is called actinic reticuloid (see below chronic actinic dermatitis).

Polymorphic light dermatosis, dermatitis bullosa pratensis, Sézary syndrome.

S.u. chronic actinic dermatitis.

S.u. Light dermatoses. S.a.u. Light protection products.

The actinic reticuloid is considered the maximum variant of chronic actinic dermatitis.

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