keratosis seborrheica

keratosis seborrheica.

See seborrheic keratosis.

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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.