/lee"zheuhn/, n.
1. an injury; hurt; wound.
2. Pathol. any localized, abnormal structural change in the body.
3. Plant Pathol. any localized, defined area of diseased tissue, as a spot, canker, blister, or scab.
4. to cause a lesion or lesions in.
[1425-75; late ME < MF < L laesion- (s. of laesio) injury, equiv. to L laes(us) (ptp. of laedere to harm, equiv. to laed- verb s. + -tus ptp. suffix, with -dt- > -s-) + -ion- -ION]

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      in physiology, a structural or biochemical change in an organ or tissue produced by disease processes or a wound. The alteration may be associated with particular symptoms of a disease, as when a gastric ulcer produces stomach pain, or it may take place without producing symptoms, as in the early stages of cancer. Certain lesions, such as the genital chancre of syphilis, are diagnostic of a particular disease, and early recognition of the physical or biochemical injury can help to prevent later, more serious manifestations of a disease; thus, the recognition and classification of disease lesions is a major part of pathology.

      Lesions may be classified as anatomic (evident to the unaided senses), histologic (evident only under a microscope), or biochemical (evident only by chemical analysis). A typical gross anatomic lesion might be the solid tumour of a carcinoma of the colon, while the corresponding histological lesion would be the atypical cells (dysplasia) that precede or surround the gross tumour; and a biochemical lesion associated with the same disease process would be the abnormal carcinoembryonic antigen found in the blood of some colon cancer patients.

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Universalium. 2010.


Look at other dictionaries:

  • lésion — [ lezjɔ̃ ] n. f. • 1160; lat. læsio, de lædere « léser » 1 ♦ Dr. Atteinte portée aux intérêts de qqn. ⇒ dommage, préjudice, tort. Spécialt (dans un contrat) Préjudice matériel qui résulte, pour une partie exploitée par l autre partie, de l… …   Encyclopédie Universelle

  • Lesion — Lésion Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Suivant les contextes, le terme lésion peut désigner différente choses : En médecine, une lésion désigne une partie d un organe se trouvant… …   Wikipédia en Français

  • lesión — f. patol. Alteración o daño producido en la estructura o función de un tejido u órgano. Medical Dictionary. 2011. lesión daño o …   Diccionario médico

  • lesion — Lesion. s. f. Tort, dommage qu on souffre en quelque transaction, en quelque marché. Il y a lesion d outre moitié de juste prix. il ne peut pas souffrir cette lesion sans s en plaindre. montrez moy en quoy il y a lesion, où est la lesion …   Dictionnaire de l'Académie française

  • lesion — le·sion / lē zhən/ n [Anglo French, damage, injury, from Latin laesio, from laedere to injure] in the civil law of Louisiana: loss from failure to receive a threshold amount or value (as one half market value) for immovable property conveyed or… …   Law dictionary

  • lesion — (n.) early 15c., from M.Fr. lesion, from L. laesionem (nom. laesio) injury, from pp. stem of laedere to strike, hurt, damage, of unknown origin. Originally with reference to any sort of hurt, whether physical or not …   Etymology dictionary

  • lesión — sustantivo femenino 1. Alteración de un tejido orgánico por una enfermedad o traumatismo: En la pelea sufrí lesiones de diversa consideración. La enfermedad le ha causado graves lesiones en los pies. 2. Daño o perjuicio en general: Las calumnias… …   Diccionario Salamanca de la Lengua Española

  • Lesion — Le sion (l[=e] zh[u^]n), n. [F. l[ e]sion, L. laesio, fr. laedere, laesum, to hurt, injure.] A hurt; an injury. Specifically: (a) (Civil Law) Loss sustained from failure to fulfill a bargain or contract. Burrill. (b) (Med.) Any morbid change in… …   The Collaborative International Dictionary of English

  • lesion — *wound, trauma, traumatism, bruise, contusion Analogous words: *injury, hurt, damage …   New Dictionary of Synonyms

  • lesion — [n] injury, wound abrasion, bruise, contusion, cut, gash, laceration, scrape, scratch, sore; concept 309 …   New thesaurus

  • lesión — (Del lat. laesĭo, ōnis). 1. f. Daño o detrimento corporal causado por una herida, un golpe o una enfermedad. 2. Daño, perjuicio o detrimento. 3. Der. Daño que se causa en las ventas por no hacerlas en su justo precio. 4. Der. Perjuicio sufrido… …   Diccionario de la lengua española

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