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Actinic keratosis (AK), sometimes called solar keratosis or senile keratosis, [1] [2] is a pre-cancerous [3] area of thick, scaly, or crusty skin. [ 4 ] [ 5 ] Actinic keratosis is a disorder ( -osis ) of epidermal keratinocytes that is induced by ultraviolet (UV) light exposure ( actin- ).
9. ] Cutaneous squamous-cell carcinoma (cSCC), also known as squamous-cell carcinoma of the skin or squamous-cell skin cancer, is one of the three principal types of skin cancer, alongside basal-cell carcinoma and melanoma. [10] cSCC typically presents as a hard lump with a scaly surface, though it may also present as an ulcer. [1]
The lesions, which primarily affect sun-exposed areas such as the face, neck, chest, and upper arms, begin as red or skin-colored papules and progress insidiously to annular plaques with uplifted edges and atrophic central skin. [5] Actinic granulomais has been reported to have a slow but self-limited course that can last up to ten years. [3]
Skin cancers are cancers that arise from the skin. They are due to the development of abnormal cells that have the ability to invade or spread to other parts of the body. [10] It occurs when skin cells grow uncontrollably, forming malignant tumors. The primary cause of skin cancer is prolonged exposure to ultraviolet (UV) radiation from the sun ...
Actinic cheilitis is cheilitis (lip inflammation) caused by long term sunlight exposure. Essentially it is a burn , [ 2 ] and a variant of actinic keratosis which occurs on the lip. [ 5 ] It is a premalignant condition , [ 6 ] as it can develop into squamous cell carcinoma (a type of mouth cancer ).
Keratoacanthoma. Keratoacanthoma (KA) is a common low-grade (unlikely to metastasize or invade) rapidly-growing skin tumour that is believed to originate from the hair follicle (pilosebaceous unit) and can resemble squamous cell carcinoma. [1][2] The defining characteristic of a keratoacanthoma is that it is dome-shaped, symmetrical, surrounded ...
Chronic actinic dermatitis is a condition characterized by chronic skin inflammation due to sunlight or artificial light. It is similar to solar urticaria or cholinergic urticaria . Patients often have related skin conditions that cause dermatitis in response to a variety of stimuli , including flowers, sunscreens, and cosmetics.
Solar purpura (also known as "Actinic purpura," and "Senile purpura") is a skin condition characterized by large, sharply outlined, 1- to 5-cm, dark purplish-red ecchymoses appearing on the dorsa of the forearms and less often the hands. [1] The condition is most common in elderly people of European descent. It is caused by sun-induced damage ...