ichthyosis hystrix

ichthyosis /ich·thy·o·sis/ (-sis) any in a group of cutaneous disorders characterized by increased or aberrant keratinization, resulting in noninflammatory scaling of the skin; most are genetically determined; often used to denote i. vulgaris. ichthyot´ic

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ichthyosis hys´trix  a rare form of epidermolytic hyperkeratosis, marked by generalized, dark brown, linear verrucoid ridges somewhat like porcupine skin.

lamellar ichthyosis  a hereditary disease present at or soon after birth, with large, quadrilateral, grayish brown scales; it may be associated with short stature, oligophrenia, spastic paralysis, genital hypoplasia, hypotrichia, and shortened life-span.

ichthyosis sim´plex  i. vulgaris.

ichthyosis u´teri  transformation of the columnar epithelium of the endometrium into stratified squamous epithelium.

ichthyosis vulga´ris  hereditary ichthyosis present at or shortly after birth, with large, thick, dry scales on the neck, ears, scalp, face, and flexural surfaces.

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ichthyosis hystrix

Etymology: Gk, ichthys, fish + -osis, condition + hystrix, porcupine

a localized form of epidermolytic hyperkeratosis having the appearance of linear epidermal nevi. See also epidermolytic hyperkeratosis.