acanthosis
An increase in the thickness of the stratum spinosum of the epidermis. [acantho- + G. -osis, condition]
- glycogenic a. elevated gray-white plaques of distal esophageal or vaginal mucosa, with epithelium thickened by proliferation of large glycogen-filled squamous cells.
- a. nigricans an eruption of velvet warty benign growths and hyperpigmentation occurring in the skin of the axillae, neck, anogenital area, and groin; in adults, may be associated with internal malignancy, endocrine disorders, or obesity; a benign hereditary type occurs in children. SEE ALSO: pseudoacanthosis nigricans. [L. fr. niger, black]

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ac·an·tho·sis -'thō-səs n, pl -tho·ses -.sēz a benign overgrowth of the stratum spinosum of the skin
ac·an·thot·ic -'thät-ik adj

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n.
an increase in the number of prickle cells in the innermost layer of the epidermis, leading to thickening of the epidermis. Acanthosis nigricans is believed to be associated with insulin resistance; it is characterized by papillomatous growths, mainly in the armpits, giving the skin a pigmented appearance and a velvety texture. It may be benign or malignant. Pseudoacanthosis nigricans is more common and is associated with obesity.

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ac·an·tho·sis (ak″an-thoґsis) [acanth- + -osis] diffuse hyperplasia of the spinous layer of the skin. Called also hyperacanthosis.

Medical dictionary. 2011.

Look at other dictionaries:

  • Acanthosis — vgl. Akanthose …   Das Wörterbuch medizinischer Fachausdrücke

  • ACANTHOSIS — NIGR1CANS (от греч. асап tha шип и лат. niger черный), папиллярно пигментная дистрофия кожи, редкий дерматоз, в тяжелой прогрессирующей форме наблюдающийся в пожилом возрасте и во многих случаях сочетающийся со злокачественными новообразованиями… …   Большая медицинская энциклопедия

  • acanthosis — n. an increase in the number of prickle cells in the innermost layer of the epidermis, leading to thickening of the epidermis. Acanthosis nigricans is associated with insulin resistance; it is characterized by papillomatous growths, mainly in the …   The new mediacal dictionary

  • acanthosis — noun A benign abnormal thickening of the stratum spinosum layer of the epidermis …   Wiktionary

  • Acanthosis — Akanthose (fachsprachlich) …   Universal-Lexikon

  • acanthosis — É™ kænθ əʊsɪs n. thickening of the inner layer of skin (Medical) …   English contemporary dictionary

  • acanthosis — ac·an·tho·sis …   English syllables

  • acanthosis — noun an abnormal but benign thickening of the prickle cell layer of the skin (as in psoriasis) • Derivationally related forms: ↑acanthotic • Hypernyms: ↑skin disease, ↑disease of the skin, ↑skin disorder • Part Holonyms: ↑ …   Useful english dictionary

  • Acanthosis nigricans — Classification and external resources Acanthosis nigricans on axilla ICD 10 L …   Wikipedia

  • Acanthosis Nigricans — L acanthosis nigricans est une maladie de la peau faite de taches épaissies et bronzées. L origine étymologique de ce nom est à la fois grecque et latine : du grec akantha qui signifie épine, écaille et du latin nigricare qui signifie être… …   Wikipédia en Français

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