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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 keratosis, pre-cancerous area of thick, scaly, or crusty skin (Below) with cutaneous horn tissue (above) Cutaneous horns , also known by the Latin name cornu cutaneum , are unusual keratinous skin tumors with the appearance of horns, or sometimes of wood or coral.
Keratosis obturans is a relatively uncommon ear disease, where a dense plug of keratin, formed by abnormal accumulation of desquamated skin in sheet-like layers , forms in the bony (deeper) part of the external auditory canal. [1]
SCC of the skin begins as a small nodule and as it enlarges the center becomes necrotic and sloughs and the nodule turns into an ulcer, and generally are developed from an actinic keratosis. Once keratinocytes begin to grow uncontrollably, they have the potential to become cancerous and produce cutaneous squamous-cell carcinoma. [22]
Lichenoid actinic keratosis; Lichenoid keratosis (benign lichenoid keratosis, lichen planus-like keratosis, solitary lichen planus, solitary lichenoid keratosis) Linear verrucous epidermal nevus (linear epidermal nevus, verrucous epidermal nevus) Malignant acrospiroma (spiradenocarcinoma) Malignant mixed tumor (malignant chondroid syringoma)
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
Acanthoma fissuratum, also known as granuloma fissuratum is a cutaneous condition characterized by local thickening of the skin in response to pressure caused by an eyeglass frame.
702.0 Actinic keratosis; 702.1 Seborrheic keratosis; 703 Diseases of nail. 703.0 Ingrown nail; 704 Diseases of hair and hair follicles. 704.0 Alopecia, unspec. 704.1 Hirsutism; 705 Disorders of sweat glands. 705.1 Prickly heat, heat rash. 705.83 Hidradenitis suppurativa; 706 Diseases of sebaceous glands. 706.0 Acne varioliformis; 706.1 Other ...
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