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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- ).
Actinic granuloma is distinguished histopathologically by multinucleated foreign body giant cells that phagocytize the degenerated elastic fibers, a process known as elastophagocytosis. At the solar elastosis level, there is no necrobiosis , such as facial necrobiosis lipoidica , or mucinosis , such as GA or sarcoid-like granuloma in the dermis.
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3]
Treatment is stopped when ulceration and crusting appear. There is minimal scarring. Complete clearance has been reported in about 50% of patients. [13] Imiquimod (Aldara) is an immune response modifier that has been studied for the treatment of actinic cheilitis. It promotes an immune response in the skin leading to apoptosis (death) of the ...
Keratosis (from kerat-+ -osis) [1] is a growth of keratin on the skin or on mucous membranes stemming from keratinocytes, the prominent cell type in the epidermis. More specifically, it can refer to: actinic keratosis (also known as solar keratosis), a premalignant condition; chronic scar keratosis; hydrocarbon keratosis
Epidermolytic ichthyosis (EI), [a] is a severe form of dry scaly skin, that initially presents with redness, blisters, erosions, and peeling in a newborn baby. [5] [6] Hyperkeratosis typically develops several months later. [6] Other symptoms include itch, painful fissures, strong body odor, and absence of sweat. [6]
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.
Some newborn infections cause bumps or boils, which may look like erythema toxicum neonatorum. [6] Bacterial infections, including Staphylococcus and Streptococcus infections, almost always cause additional symptoms. These symptoms may be severe, and they are usually not limited to rash. Bacterial rashes can be diagnosed by testing pus from a ...
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