follicular hyperkeratosis
- follicular hyperkeratosis
- a skin condition characterized by hyperkeratosis of hair follicles, resulting in rough, cone-shaped, elevated papules whose openings are often closed with a white plug of sebum. Deficiencies of vitamins A and E, B complex vitamins, and essential fatty acids have all been implicated in the etiology. Called also phrynoderma and toad skin.
Medical dictionary.
2011.
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hyperkeratosis — Thickening of the horny layer of the epidermis or mucous membrane. SEE ALSO: keratoderma, keratosis. SYN: hyperkeratinization. h. congenita SYN: ichthyosis vulgaris. diffuse h. of palms and soles an … Medical dictionary
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lichen — A discrete flat papule or an aggregate of papules giving a patterned configuration resembling l. growing on rocks. [G. leichen, l.; a lichenlike eruption] l. myxedematosus a lichenoid eruption of papules on the upper body of mucinous edema due to … Medical dictionary
phrynoderma — A follicular hyperkeratotic eruption thought to be due to deficiency of vitamin A. SYN: toad skin. [G. phrynos, toad, + derma, skin] * * * phry·no·der·ma .frī nə dər mə n a rough dry skin eruption marked by keratosis and usu. associated with… … Medical dictionary
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vitamin A — a yellow, fat soluble, solid terpene alcohol, C20H30O, obtained from carotene and occurring in green and yellow vegetables, egg yolk, etc.: essential to growth, the protection of epithelial tissue, and the prevention of night blindness. Also… … Universalium