What's the difference between keloid and scar?

Keloid


Definition:

  • (a.) Applied to a variety of tumor forming hard, flat, irregular excrescences upon the skin.
  • (n.) A keloid tumor.

Example Sentences:

  • (1) The fabrication of a device to exert pressure on a keloid of the lip is described.
  • (2) In clinical practice in the United Kingdom most keloid scars occur spontaneously.
  • (3) There were also 17 recurrences in a group of 23 keloids excised by laser, 9 occurring between 6 and 12 months postoperatively.
  • (4) Acne keloidalis is characterized by infected keloid-like nodules in the short-cut nuchal region probably caused by recurving, ingrowing hairshafts.
  • (5) We have studied the effect of minoxidil on 3H-deoxythymidine uptake in cultures of human dermal fibroblasts derived from lesional and non-lesional skin from patients with keloids.
  • (6) Warts, tattoos, actinic cheilitis, skin cancer, xanthelasma, ingrown toenails, keloids and port-wine stains are among the lesions that can be removed with laser surgery.
  • (7) Tranilast, an anti-allergic drug that inhibits the release of substances such as histamine and prostaglandins from mast cells, has been reported to improve keloids and hypertrophic scars which originate from the abnormal proliferation and excessive collagen accumulation of fibroblasts.
  • (8) Analysis of X-rays of 317 traumatic paraplegics and tetraplegics of different racial groups shows that there is no higher incidence of ectopic bone formation in dark-skinned patients although there is an increased predisposition for keloid formation in dark-skinned races.
  • (9) Patients' failure to use the recommended pressure earring and alteration in endocrine balance were noted in three of the four patients with recurrent keloids.
  • (10) Acne keloidalis nuchae is characterized by keloidal papules and plaques.
  • (11) The clinical manifestation of keloids, physiology of wound healing, pathophysiology of keloid formation, and the radiation technique utilized are presented.
  • (12) To our knowledge, this is the first report of an umbilical keloid occurring at such an early age.
  • (13) Moreover, our own studies revealed an excellent effect on keloids, which became smoother and visibly paler.
  • (14) Preliminary investigations have shown that immunotherapy may be of value in the treatment of keloids.
  • (15) Keloid-derived fibroblasts exhibit as much as a four-fold increase in the rate of fibronectin biosynthesis compared to fibroblasts from normal dermis and normal scars.
  • (16) We report the extremely rare development of a large, submental, submaxillary suppurative keloid in a black woman, with resulting sinus tract formation and intraoral drainage.
  • (17) After some rather unsuccessful excision-suture of the keloid they recommend the intra- keloid excision to be followed by a late corticoid infiltration but deferred until the 15th day.
  • (18) Paucity of lobular cartilage; the flat dorsum; short columella; wide flaring nares; and skin that tends to keloid formation have led many surgeons to attempt radical surgical techniques to obtain rather limited results.
  • (19) Studies have been made of the glycosaminoglycan (GAG) composition of implants of keloid and hypertrophic scars in athymic nude mice in order to evaluate these implants as a model for studies of causation and therapy of these abnormal human scars.
  • (20) The treatment of keloids continues to be an enigma to the surgeon and the patient as well.

Scar


Definition:

  • (n.) A mark in the skin or flesh of an animal, made by a wound or ulcer, and remaining after the wound or ulcer is healed; a cicatrix; a mark left by a previous injury; a blemish; a disfigurement.
  • (n.) A mark left upon a stem or branch by the fall of a leaf, leaflet, or frond, or upon a seed by the separation of its support. See Illust.. under Axillary.
  • (v. t.) To mark with a scar or scars.
  • (v. i.) To form a scar.
  • (n.) An isolated or protruding rock; a steep, rocky eminence; a bare place on the side of a mountain or steep bank of earth.
  • (n.) A marine food fish, the scarus, or parrot fish.

Example Sentences:

  • (1) The authors examined an eye obtained post-mortem from a patient with chronic granulomatous disease of childhood and clinically apparent chorioretinal scars.
  • (2) 14 patients with painful neuroma, skin hyperesthesia or neuralgic rest pain were followed up (mean 20 months) after excision of skin and scar, neurolysis and coverage with pedicled or free flaps.
  • (3) In spite of the presence of scar tissue following rhytidectomy, this procedure has been quite successful because of the rich blood supply in that area.
  • (4) Following a dosage of 300,000 IU streptokinase the lysis was stopped because of severe bleeding from the urethrotomy scar.
  • (5) Differences in scar depression also supported the idea of more stretching in the Dexon group.
  • (6) These findings support the hypothesis that the presence of FSC tissue will have an effect on the persistence of glial scar tissue in a chronic lesion site as well as limit the extent to which a new scar is formed in response to a second injury to the spinal cord.
  • (7) Thirty patients required a second operation to an area previously addressed reflecting inadequacies in technique, the unpredictability of bone grafts, and soft-tissue scarring.
  • (8) The observed clinical findings include scarring of the face and hands (83.7%), hyperpigmentation (65%), hypertrichosis (44.8%), pinched facies (40.1%), painless arthritis (70.2%), small hands (66.6%), sensory shading (60.6%), myotonia (37.9%), cogwheeling (41.9%), enlarged thyroid (34.9%), and enlarged liver (4.8%).
  • (9) To test this hypothesis 30 Wistar rats were subjected to laparotomy and colonic resection and treated with 5-Fluorouracil or Mitomycin C. The bursting strength of the abdominal scars and the colonic anastomotic bursting pressure revealed some interference in the rats treated with 5-Fluorouracil (Student's t test P less than 0.05) but none in the case of Mitomycin C. This preliminary study deserves to be followed up.
  • (10) The patient suffers little inconvenience, has a very small scar and is in hospital only a short time.
  • (11) Skin affected by a burn cancer is scarred, ulcerated, and often appears as erythema ab igne clinically in adjacent skin.
  • (12) Extraction tools included flexible, telescoping sheaths advanced over the lead to dilate scar tissue and apply countertraction, deflection catheters, and wire basket snares.
  • (13) The ensuing scars were similar with respect to scar width and the amount of collagen in the scar.
  • (14) Several stages in its histogenesis may be discerned: I. focal necroses of hepatic cells associated with their invasion with lister Listeria; 2. appearance of cellular elements around the foci of necroses with subsequent formation of granulemas consisting mainly of leucocytes and lymphoid cells; 3. development of necrobiotic changes in the central areas of granulemas with concomitance of exudative processes; 4. organization of necrotic foci with subsequent scarring.
  • (15) This method keeps the fracture closed and leaves no scar.
  • (16) Regarding ureters read as true positives on indirect study, if that ureter has ever shown reflux at any time, or if it drained a scarred kidney specificity was improved to 97% without changing the sensitivity.
  • (17) Both acquired defects were covered by two different cross-finger flap techniques, despite extensive scarring of the adjacent finger.
  • (18) After the completion of rejection reaction, inflammation finally induced scarring or necrosis of the tracheal allograft, resulting in asphyxia or perforation.
  • (19) Autopsy findings showed no scar formation of his testes, and the primary lesion was finally diagnosed to be in the anterior mediastinum.
  • (20) Following this combination procedure the patients were relieved completely of obstructive jaundice and right upper quadrant pain, leaving only small trocar insertion scars made during the short course of hospitalization.

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