eponychium


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eponychium

 [ep″o-nik´e-um]
2. the horny fetal epidermis at the site of the future nail.

ep·o·nych·i·um

(ep'ō-nik'ē-ŭm),
1. The corneal layer of epidermis overlapping and in direct contact with the nail root proximally or the sides of the nail plate laterally, forming the undersurface of the nail wall or nail folds. Synonym(s): hidden nail skin, perionychium
2. The thin, condensed, eleidin-rich layer of epidermis that precedes and initially covers the nail plate in the embryo. It normally degenerates by the eighth month except at the nail base where it remains as the cuticle of the nail.
3. The thin skin adherent to the nail at its proximal portion.
Synonym(s): epionychium
[G. epi, upon, + onyx (onych-), nail]

eponychium

/ep·o·nych·i·um/ (ep″o-nik´e-um)
1. cuticle; the narrow band of epidermis extending from the nail wall onto the nail surface.
2. the horny fetal epidermis at the site of the future nail.

eponychium

See cuticle, def 3.

ep·o·nych·i·um

(ep'ō-nik'ē-ŭm) [TA]
1. The thin, condensed, eleidin-rich layer of epidermis that precedes and initially covers the nail plate in the embryo. It normally degenerates by the eighth month, except at the nail base, where it remains as the cuticle of the nail.
2. The corneal layer of epidermis overlapping and in direct contact with the nail root proximally or the sides of the nail plate laterally, forming the undersurface of the nail wall or nail folds.
Synonym(s): perionychium.
3. The thin skin adherent to the nail at its proximal portion.
[G. epi, upon, + onyx (onych-), nail]

eponychium

1. the narrow band of epidermis extending from the claw wall onto the claw surface; commonly called cuticle.
2. the horny fetal epidermis at the site of the future claw.
References in periodicals archive ?
Involvement of the eponychium and paronychium is common with advanced disease.
Ideally, the mediator layer would function as the eponychium (cuticle) and hyponychium that comprise the junction between the skin stratum corneum and the base of the nail plate [138].
Many patients with subungual melanoma have a history of a thin pigmented streak that had remained unchanged for years and then suddenly began to enlarge--eventually involving the entire nail bed with subsequent penetration to the eponychium or paronychium, ulceration, or granuloma formation.