Rather rarely occurring variant of actinic keratoses (see below Keratosis actinica (overview), which is characterized by a varying degree of pigmentation. Actinic keratoses are so-called precanceroses, i.e. non-invasive, early (in situ) squamous cell carcinomas.
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Keratosis actinica pigmented typeL57.00
DefinitionThis section has been translated automatically.
EtiopathogenesisThis section has been translated automatically.
S.u. Keratosis actinica
ManifestationThis section has been translated automatically.
Especially occurring in light-skinned, sunburn prone and elderly people. Men are more frequently affected than women. Actinic keratoses are the first, clinically manifest skin changes in a UV-damaged area of skin, in which potentially further lesions can develop. This is known as"field carcinogenesis".
LocalizationThis section has been translated automatically.
Chronically light-exposed skin areas of the scalp, especially forehead, bald head, nose, auricles, cheeks, back of the hand, red lips (Cheilitis actinica). Less frequently: décolleté, extensor side of the forearms, back of the hands, lower legs,
Clinical featuresThis section has been translated automatically.
- Initially a few millimetres in size, round, oval or irregular, sharply or blurredly defined, reddish-brown or brown, but also blue-black, flat papules or plaques with a rough, horny surface, also interspersed with telangiectasias. Continuous increase in size (1.0-2.0 cm or larger). Tendency to bleed after small injuries. Apart from its coloration, this type is not significantly different from the other clinical variants of actinic keratoses.
TherapyThis section has been translated automatically.
S.u. Keratosis actinica