| epidermidosis | A skin disease affecting only the epidermis. Synonym: epidermidosis. (05 Mar 2000) |
|---|---|
| epidermis | 1. <dermatology> The basal layer of the mammalian epidermis contains cells that undergo repeated divisions. The cells outwards from a particular basal cell are often derived from this cell or a nearby one so that columns of cells exist running outwards from the stem cell in the basal layer from which they were derived. Such columns of cells are referred to as proliferative units. 2. <biology> Outer epithelial layer of a plant or animal. May be a single layer that produces an extracellular material (as for example the cuticle of arthropods) or a complex stratified squamous epithelium, as in the case of many vertebrate species. (18 Nov 1997) |
| epidermitis | Inflammation of the epidermis or superficial layers of the skin. (05 Mar 2000) |
| epidermitis, exudative, of swine | An acute generalised dermatitis of pigs which occurs from 5 to 35 days of age, characterised by sudden onset, with morbidity of 10 to 90% and mortality of 5 to 90%. The lesions are caused by staphylococcus hyos but the bacterial agent is unable to penetrate the intact skin. Abrasions on the feet and legs or lacerations on the body frequently precede infection. In acute cases, a vesicular-type virus may be the predisposing factor. The causative organism is inhibited by most antibiotics. (merck veterinary manual, 5th ed) (12 Dec 1998) |
| epidermization | 1. Rarely used term for skin grafting. 2. Rarely used term for the covering of an area with epidermis. (05 Mar 2000) |
| epidermodysplasia | Faulty growth or development of the epidermis. Origin: epidermis + G. Dys-, bad, + plasis, a molding (05 Mar 2000) |
| epidermodysplasia verruciformis | An autosomal recessive trait with impaired cell-mediated immunity. About 15 human papilloma viruses are implicated in associated infection, four of which lead to skin neoplasms. The disease begins in childhood with red papules and later spreads over the body as gray or yellow scales. (12 Dec 1998) |
| epidermoid | <anatomy> Like epidermis; pertaining to the epidermis. Origin: Cf. F. Epidermoide. Source: Websters Dictionary (01 Mar 1998) |
| epidermoid cancer | A type of lung cancer in which the cells are flat and look like fish scales. Also called squamous cell carcinoma. (12 Dec 1998) |
| epidermoid carcinoma | A type of lung cancer in which the cells are flat and look like fish scales. Also called squamous cell carcinoma. (12 Dec 1998) |
| epidermoid cyst | A closed sac (sebaceous gland) within the tissue containing oily or fatty semi-solid material. These cysts are found most commonly on the genitalia, vulva or labia. Features include a nontender, small lump in the skin. Sebaceous cysts which turn red or tender may require treatment with oral antibiotics. Warm wet compresses may help the cyst expel some of its contents. Surgical excision of the cyst may be necessary to prevent recurrence. (27 Sep 1997) |
| epidermoid inclusion cyst | <radiology> Well-circumscribed radiolucent lesion showing a thin cortical margin that may not be visible in its entirety, frequently in the terminal phalanx, history of penetrating trauma is often elicited Differential diagnosis: ABC, enchondroma (12 Dec 1998) |
| epidermolysis | A condition in which the epidermis is loosely attached to the corium, readily exfoliating or forming blisters. Origin: epidermis + G. Lysis, loosening (05 Mar 2000) |
| epidermolysis bullosa | This represents a group of rare inherited disorders in which blistering of the skin occurs in response to skin trauma. Large fluid-filled blisters can occur in response to injury, skin rubbing, chafing or even increases in room temperature. Secondary bacterial infection of the blisters is common. Complications include oesophageal stricture, infections, loss of function of hands and feet and malnutrition. The dermatologist is the expert in the evaluation and treatment of this disorder. (27 Sep 1997) |
| epidermolysis bullosa acquisita | Form of epidermolysis bullosa characterised by trauma-induced, subepidermal blistering with no family history of the disease. Direct immunofluorescence shows IgG deposited at the dermo-epidermal junction. (12 Dec 1998) |