parakeratosis


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parakeratosis

 [par″ah-ker″ah-to´sis]
persistence of the nuclei of keratinocytes as they rise into the horny layer of the skin; it occurs normally in the epithelium of the true mucous membrane of the mouth and vagina.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

par·a·ker·a·to·sis

(par'ă-ker'ă-tō'sis),
Retention of nuclei in the cells of the stratum corneum of the epidermis, observed in many scaling dermatoses such as psoriasis and subacute or chronic dermatitis.
Farlex Partner Medical Dictionary © Farlex 2012

par·a·ker·a·to·sis

(par'ă-ker'ă-tō'sis)
Retention of nuclei in the cells of the stratum corneum of the epidermis, observed in many scaling dermatoses such as psoriasis and subacute or chronic dermatitis.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

par·a·ker·a·to·sis

(par'ă-ker'ă-tō'sis)
Retention of nuclei in the cells of the stratum corneum of the epidermis, observed in many scaling dermatoses such as psoriasis and subacute or chronic dermatitis.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
These papillae are surmounted by columns of parakeratosis ("church spire" parakeratosis), whereas the "valleys" between the papillae show hypergranulosis (Figure 7, B).
Histopathology is nonspecific and includes hyperkeratosis, parakeratosis, pallor of upper epidermis, capillary dilatation, dermal edema and perivascular lymphohistiocytic infiltrate.
Skin biopsy is rarely performed because histologic findings usually are not specific and include focal parakeratosis, spongiosis, acanthosis, and perivascular lymphohistiocytic infiltrate.
In this article, two patients with melanocytic nevi surrounded by eczema, characterized by histologic features of parakeratosis, spongiosis, acanthosis in the epidermis and perivascular lymphocytic infiltrate within the dermis, were described.
Regarding histopathology, the lesions in each patient were composed of stratified squamous epithelium with parakeratosis covering bundles of striated muscles, without the normal skin appendages.
Specifically, the epithelial hyperplastic pattern in a transitional manner changed into a relatively thinner squamous epithelium that exhibited parakeratosis, basal cell hydropic degeneration, and a band-like subepithelial dense chronic inflammatory infiltrate mainly by lymphocytes (Figure 2, inset).
Typical histological findings include spongiotic and lichenoid interface dermatitis with superficial and deep perivascular infiltrate and epidermal changes including hyperkeratosis, parakeratosis, focal spongiosis, and lymphocytic exocytosis.
Image category Number of images Label Hyperpigmentation of basal cell layer 162 T1 Acanthosis 451 T2 Parakeratosis 265 T3 Hyperkeratosis 328 T4 Infiltration of lymphocytes 597 T5 Papillomatosis 216 T6 Table 3: The comparison of algorithm overall accuracy.
Caption: FIGURE 3: Higher magnification showing the area of defect containing neutrophils, parakeratosis, and degenerating keratinocytes (hematoxylin and eosin stain, original magnification x200).
Marked hyperkeratosis and parakeratosis of the eyelid margin with extension of this cell atypia into the tarsal conjunctiva.
Civatte bodies, acanthosis, and parakeratosis are the results of lymphocytic infiltration of subepithelial tissue, basal membrane impairment, and degenerations of keratinocytes [1].
A skin biopsy showed "irregular" acanthosis, parakeratosis, and psoriasiform epidermal hyperplasia (Figure 3).