keratosis /ker·a·to·sis/ (ker″ah-to´sis) pl. kerato´ses any horny growth, such as a wart or callosity.keratot´ic
Keratosis
keratosis
keratosis [ker″ah-to´sis]
keratosis (keˈ·r
·tōˑ·sis),
keratosis (ker´
tō´sis),
keratosis
actinic keratosis a sharply outlined verrucous 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.
keratosis blennorrha´gica keratoderma blennorrhagicum.
keratosis follicula´ris a hereditary form marked by areas of crusting, itching, verrucous papular growths which may fuse to form papillomatous and warty malodorous growths.
inverted follicular keratosis a benign usually solitary epithelial tumor originating in a hair follicle and occurring as a flesh-colored nodule or papule.
keratosis palma´ris et planta´ris palmoplantar keratoderma.
keratosis pharyn´gea that characterized by horny projections from the tonsils and the orifices of the lymph follicles in the pharyngeal walls.
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 tumor of epidermal origin, marked by soft friable plaques with slight to intense pigmentation, most often on the face, trunk, and limbs.
senile keratosis , solar keratosis actinic k.
ker·a·to·sis (k r  -t  s s)n. pl. ker·a·to·ses (-s  z) Excessive growth of horny tissue of the skin. ker a·totic (-t tk) adj. |
Keratosis
A skin disease characterized by an overgrowth of skin, which usually appears discolored.
Mentioned in: Hyperpigmentation
keratosis
[ker′ətō′sis]
Etymology: Gk, keras + osis, condition
any skin lesion in which there is overgrowth and thickening of the cornified epithelium. Approximately 20% of these skin lesions develop into squamous cell carcinoma. Prevention includes the use of sunscreen and the avoidance of drugs known to cause photosensitivity reactions. Kinds of keratosis include actinic keratosis, keratosis pilaris, keratosis senilis, and seborrheic keratosis. keratotic, adj.
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.
keratosis (keˈ·r
·tōˑ·sis),n skin condition indicated by the presence of noticeable increased growth and thickening of cornified epithelium. Actinic keratosis, seborrheic keratosis, and keratosis senilis are examples of this skin condition.
keratosis (ker´
tō´sis),n 1. a horny or cornified growth (e.g., wart, callosity).
n 2. a condition characterized by cornification, or hyperkeratinization, of the tissues.
n 2. a condition characterized by cornification, or hyperkeratinization, of the tissues.
keratosis, actinic,
n an overgrowth of the horny layer of the epidermis caused by excessive exposure to the sun.
keratosis blennorrhagia
(blen´rā´jē),
n a skin condition found in Reiter's syndrome characterized by pustules and crusting; once incorrectly associated with gonorrhea; more recently considered a genetic disorder occurring mostly in men between the ages of 20 and 25.
rā´jē), n a skin condition found in Reiter's syndrome characterized by pustules and crusting; once incorrectly associated with gonorrhea; more recently considered a genetic disorder occurring mostly in men between the ages of 20 and 25.
keratosis, chronic senile,
n keratosis of the lips in elderly individuals. These lesions should be considered precancerous.
keratosis, focal,
n localized areas of increased cornification (hyperkeratinization). Such lesions are seen particularly on the lips.
keratosis follicularis,
n See disease, Darier's.
keratosis, seborrheic (basal cell papilloma, verruca senilis)
(seb´rē´ik pap´lōm vroo´k sē´nilis),
n benign, pigmented, superficial epithelial tumors that clinically appear to be pasted on the skin of the trunk, arms, or face. Characterized histologically by marked hyperkeratosis, with keratin cyst formation, acanthosis of basal cells, and melanin pigmentation, all above the level of the adjacent epidermis.
rē´ik pap´lōm vroo´k sē´nilis), n benign, pigmented, superficial epithelial tumors that clinically appear to be pasted on the skin of the trunk, arms, or face. Characterized histologically by marked hyperkeratosis, with keratin cyst formation, acanthosis of basal cells, and melanin pigmentation, all above the level of the adjacent epidermis.
keratosis, senile,
n small, firm lesions occurring principally on the face and back of the hands in elderly people or those exposed to the sun. There is hyperkeratosis with irregular and atypical proliferation of the cells of the rete Malpighi. The condition is one of premalignancy with tendency toward epidermoid carcinoma. See also leukoplakia.
keratosis
any horny growth on the skin, such as a wart or callosity; a firm, elevated, circumscribed area of excessive keratin production. Common in humans but uncommon in animals.
actinic keratosis
varies from a sharply outlined verrucous or keratotic growth to poorly defined areas of erythema, which are premalignant lesions. Due to excessive exposure to the sun. Called also solar keratosis.
equine cannon keratosis
see cannon keratosis.
linear keratosis
see equine linear keratosis.
keratosis pilaris
hyperkeratosis limited to the hair follicles.
seborrheic keratosis, keratosis seborrheica
single or multiple elevated plaques and nodules often hyperpigmented with a hyperkeratotic greasy surface. They are benign, of unknown etiology, but have no connection with seborrhea. Occur in dogs and humans.
solar keratosis
see actinic keratosis (above).
keratosis
Dermatology A condition characterized by ↑ keratin production See Actinic keratosis, Seborrheic keratosis, Stucco keratosis.
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