scar

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scar,

fibrous connective tissueconnective tissue,
supportive tissue widely distributed in the body, characterized by large amounts of intercellular substance and relatively few cells. The intercellular material, or matrix, is produced by the cells and gives the tissue its particular character.
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 that forms at the site of injury or disease in any tissue of the body. Scar tissue may replace injured skin and underlying muscle, damaged heart muscle, or diseased areas of internal organs such as the liver. Dense and thick, it is usually paler than the surrounding tissue because it is poorly supplied with blood, and although it structurally replaces destroyed tissue, it cannot perform the functions of the missing tissue. Scar tissue may therefore limit the range of muscle movement or prevent proper circulation of fluids when affecting the lymphatic or circulatory system. Extensively scarred tissue may lose its ability to function normally.

Scar

 

the end result of the development of connective tissue at the site of the healing of a wound or ulcer. The timely surgical treatment of an incised wound with smooth margins leaves a soft and sometimes barely noticeable linear scar. Large wounds that suppurate and heal by second intention form granulations and subsequently epithelize, resulting in the formation of broad scars that are attached to underlying tissues.

Excessive scar tissue that is elevated above the skin surface is called a keloid. Extensive scars formed after burns or the prolonged healing of suppurative wounds in the area of extremity joints or on the neck result in a limitation of mobility, or contracture; these scars require plastic surgery. Scars that develop after the healing of gastric or duodenal ulcers often lead to the deformation of the stomach and duodenum, the disruption of evacuation from the stomach, and the development of pyloric stenosis.

scar

[skär]
(geology)
A steep, rocky eminence, such as a cliff or precipice, where bare rock is well exposed. Also known as scaur; scaw.
(medicine)
A permanent mark on the skin or other tissue, formed from connective-tissue replacement of tissue destroyed by a wound or disease process.

scar

1
1. any mark left on the skin or other tissue following the healing of a wound
2. the mark on a plant indicating the former point of attachment of a part, esp the attachment of a leaf to a stem

scar

2
1. an irregular enlongated trench-like feature on a land surface that often exposes bedrock
2. a similar formation in a river or sea
References in periodicals archive ?
To investigate the mechanisms of pressure therapy on hypertrophic scar maturation, it is important for both surgeons and occupational therapists to identify the key molecule which promotes or inhibits the hypertrophic scar formation.
Keloids do not regress on their own; hypertrophic scars tend to regress spontaneously within a few years.
Pathophysiology of hypertrophic scars involves a prolonged inflammatory and proliferative phase of wound healing after injury.
14) Bodokh and Brun treated 31 keloids and 5 hypertrophic scars with 3 to 5 intralesional infiltrations of bleomycin and obtained a total regression of 84%.
Establishment and application of experimental animal model for hypertrophic scar (in Chinese) Zhonghua.
Role of verapamil in preventing and treating hypertrophic scars and keloids.
Radiation in the management of keloids and hypertrophic scars.
This study was focus to provide a concern of efficacy for clinical scars management of keloids and hypertrophic scars formation in future.
2007) confirms the poor understanding regarding molecular mechanisms that lead to the formation of keloids and hypertrophic scars.
Since 1970s, pressure garment has been the mainstay of treatment for hypertrophic scars in burn injuries [9].
The effects of asiaticoside on skin disorders such as keloid and hypertrophic scar have been studied in vitro and in vivo (Xie et al.
Patients who had undergone the longitudinal incision had five hypertrophic scars, including painful ones which were treated with corticosteroid injections however, no injury to the nerve or vein was reported.