actinic keratosis

keratosis

[ker″ah-to´sis] any horny growth, such as a wart or callosity.actinic keratosis a sharply outlined wartlike or keratotic growth, which may develop into a cutaneous horn, and may become malignant; it usually occurs in the middle aged or elderly and is due to excessive exposure to the sun. Called also senile or solar keratosis. (See Atlas 3, Part F).keratosis follicula´ris a slowly progressive autosomal dominant disorder of keratinization characterized by pinkish to tan or skin-colored papules on the seborrheic areas of the body that coalesce to form plaques, which may become crusted and secondarily infected; over time, the lesions may become darker and may fuse to form papillomatous and warty malodorous growths. Called also Darier's disease and Darier-White disease.keratosis palma´ris et planta´ris palmoplantar keratoderma.keratosis pharyn´gea horny projections from the tonsils and pharyngeal walls. Called also pharyngokeratosis.keratosis pila´ris hyperkeratosis limited to the hair follicles.keratosis puncta´ta a hereditary hyperkeratosis in which the lesions are localized in multiple points on the palms and soles.seborrheic keratosis (keratosis seborrhe´ica) a benign, noninvasive tumor of epidermal origin, marked by numerous yellow or brown, sharply marginated, oval, raised lesions.senile keratosis (solar keratosis) actinic keratosis.

ac·tin·ic ker·a·to·sis

a premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned persons; hyperkeratosis may form a cutaneous horn, and squamous cell carcinoma of low-grade malignancy may develop in a small proportion of untreated patients. Synonym(s): senile keratoderma, senile keratoma, senile keratosis, keratosis senilis, senile wart, solar keratosis, verruca plana senilis, verruca senilis

actinic keratosis

A premalignant lesion of sun-exposed skin that is overly sensitive to the effects of UV light (i.e., sunlight), and more common in the fair-skinned or elderly, and the immunocompromised.

Diagnosis
Biopsy.

Management
Cryosurgery, photodynamic therapy, laser (CO2, Er:YAG), electrocautery; some topical immune response modifiers (e.g., 5FU) may be used to promote peeling.

Prognosis
± 20% of AKs develop into squamous cell carcinoma.
Prevention
Broad-spectrum sunscreens with a sun protection factor of 17 may reduce new lesions; avoid photosensitising drugs (e.g., tetracyclines); in subjects with AK placed on a low-fat diet, the incidence of new lesions fell to 1⁄3 that of the control (non-diet intervention) group. HPV replication is thought to play a role in malignant changes.

actinic keratosis

Senile keratosis, solar keratosis Dermatology A premalignant lesion of sun-exposed skin that is overly sensitive to the effects of UV light–sunlight, and more common in the fair-skinned or elderly Clinical Discrete scaly or gritty erythematous plaques located on a sun exposed surface Diagnosis Biopsy Management Cryosurgery or electrocautery; some topicals may be used to promote peeling Prognosis ± 20% of AKs develop into SCC Prevention Broad-spectrum sunscreens with a sun protection factor of 17 may ↓ new lesions; avoid photosensitizing drugs–eg, tetracyclines. See Squamous cell carcinoma.

ac·tin·ic ker·a·to·sis

(ak-tin'ik ker'ă-tō'sis) A premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned people; hyperkeratosis may form a cutaneous horn, and squamous cell carcinoma of low-grade malignancy may develop in a small proportion of untreated patients. Treatment includes cryotherapy, surgical excision, or topical chemotherapy.

ACTINIC KERATOSIS: Actinic skin damage on forehead and scalp

actinic keratosis

Abbreviation: AK
A rough, sandpaper-textured, premalignant macule or papule caused by excess exposure to ultraviolet light. AKs often appear on facial skin (such as near the eyes, on the nose, on the ears, or the lips) and the parts of the body that receive the most sunlight exposure. Prevention of AKs depends on limiting one's exposure to sunlight, beginning in childhood and continuing throughout life. See: illustration

Treatment

Liquid nitrogen destroys these lesions and prevents them from progressing to other cancers of the skin.

Synonym: solar keratosis See: sunscreenSee also: keratosis

actinic keratosis

Local overgrowth and thickening of the EPIDERMIS of the skin caused by sunlight. This condition can progress to a form of skin cancer (SQUAMOUS CELL CARCINOMA) and is usually treated by freezing.

Actinic keratosis

A crusty, scaly pre-cancerous skin lesion caused by damage from the sun. Frequently treated with cryotherapy.Mentioned in: Cryotherapy, Skin Resurfacing

ac·tin·ic ker·a·to·sis

(ak-tin'ik ker'ă-tō'sis) A premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned people.

单词	actinic keratosis
释义	EncyclopediaSeekeratosis actinic keratosis keratosis [ker″ah-to´sis] any horny growth, such as a wart or callosity.actinic keratosis a sharply outlined wartlike or keratotic growth, which may develop into a cutaneous horn, and may become malignant; it usually occurs in the middle aged or elderly and is due to excessive exposure to the sun. Called also senile or solar keratosis. (See Atlas 3, Part F).keratosis follicula´ris a slowly progressive autosomal dominant disorder of keratinization characterized by pinkish to tan or skin-colored papules on the seborrheic areas of the body that coalesce to form plaques, which may become crusted and secondarily infected; over time, the lesions may become darker and may fuse to form papillomatous and warty malodorous growths. Called also Darier's disease and Darier-White disease.keratosis palma´ris et planta´ris palmoplantar keratoderma.keratosis pharyn´gea horny projections from the tonsils and pharyngeal walls. Called also pharyngokeratosis.keratosis pila´ris hyperkeratosis limited to the hair follicles.keratosis puncta´ta a hereditary hyperkeratosis in which the lesions are localized in multiple points on the palms and soles.seborrheic keratosis (keratosis seborrhe´ica) a benign, noninvasive tumor of epidermal origin, marked by numerous yellow or brown, sharply marginated, oval, raised lesions.senile keratosis (solar keratosis) actinic keratosis. ac·tin·ic ker·a·to·sis a premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned persons; hyperkeratosis may form a cutaneous horn, and squamous cell carcinoma of low-grade malignancy may develop in a small proportion of untreated patients. Synonym(s): senile keratoderma, senile keratoma, senile keratosis, keratosis senilis, senile wart, solar keratosis, verruca plana senilis, verruca senilis actinic keratosis A premalignant lesion of sun-exposed skin that is overly sensitive to the effects of UV light (i.e., sunlight), and more common in the fair-skinned or elderly, and the immunocompromised. Diagnosis Biopsy. Management Cryosurgery, photodynamic therapy, laser (CO2, Er:YAG), electrocautery; some topical immune response modifiers (e.g., 5FU) may be used to promote peeling. Prognosis ± 20% of AKs develop into squamous cell carcinoma. Prevention Broad-spectrum sunscreens with a sun protection factor of 17 may reduce new lesions; avoid photosensitising drugs (e.g., tetracyclines); in subjects with AK placed on a low-fat diet, the incidence of new lesions fell to 1⁄3 that of the control (non-diet intervention) group. HPV replication is thought to play a role in malignant changes. actinic keratosis Senile keratosis, solar keratosis Dermatology A premalignant lesion of sun-exposed skin that is overly sensitive to the effects of UV light–sunlight, and more common in the fair-skinned or elderly Clinical Discrete scaly or gritty erythematous plaques located on a sun exposed surface Diagnosis Biopsy Management Cryosurgery or electrocautery; some topicals may be used to promote peeling Prognosis ± 20% of AKs develop into SCC Prevention Broad-spectrum sunscreens with a sun protection factor of 17 may ↓ new lesions; avoid photosensitizing drugs–eg, tetracyclines. See Squamous cell carcinoma. ac·tin·ic ker·a·to·sis (ak-tin'ik ker'ă-tō'sis) A premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned people; hyperkeratosis may form a cutaneous horn, and squamous cell carcinoma of low-grade malignancy may develop in a small proportion of untreated patients. Treatment includes cryotherapy, surgical excision, or topical chemotherapy. ACTINIC KERATOSIS: Actinic skin damage on forehead and scalp actinic keratosis Abbreviation: AK A rough, sandpaper-textured, premalignant macule or papule caused by excess exposure to ultraviolet light. AKs often appear on facial skin (such as near the eyes, on the nose, on the ears, or the lips) and the parts of the body that receive the most sunlight exposure. Prevention of AKs depends on limiting one's exposure to sunlight, beginning in childhood and continuing throughout life. See: illustration Treatment Liquid nitrogen destroys these lesions and prevents them from progressing to other cancers of the skin. Synonym: solar keratosis See: sunscreenSee also: keratosis actinic keratosis Local overgrowth and thickening of the EPIDERMIS of the skin caused by sunlight. This condition can progress to a form of skin cancer (SQUAMOUS CELL CARCINOMA) and is usually treated by freezing. Actinic keratosis A crusty, scaly pre-cancerous skin lesion caused by damage from the sun. Frequently treated with cryotherapy.Mentioned in: Cryotherapy, Skin Resurfacing ac·tin·ic ker·a·to·sis (ak-tin'ik ker'ă-tō'sis) A premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned people. AcronymsSeeany key actinic keratosis noun Words related to actinic keratosis noun an overgrowth of skin layers resulting from extended exposure to the sun Related Words keratosis
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actinic keratosis

keratosis

ac·tin·ic ker·a·to·sis

actinic keratosis

actinic keratosis

ac·tin·ic ker·a·to·sis

actinic keratosis

Treatment

actinic keratosis

Actinic keratosis

ac·tin·ic ker·a·to·sis

actinic keratosis

Words related to actinic keratosis

noun an overgrowth of skin layers resulting from extended exposure to the sun

Related Words