Keratosis actinica pigmented type L57.00

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.

S.u. Keratosis actinica

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".

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,

• 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.

S.u. Keratosis actinica