exostosis

A cartilage-capped bony projection arising from any bone that develops from cartilage. SEE ALSO: osteochondroma. SYN: hyperostosis (2), poroma (2). [exo- + G. osteon, bone, + -osis, condition]
- e. bursata an e. arising from the joint surface of a bone and covered with cartilage and a synovial sac.
- e. cartilaginea an ossified chondroma arising from the epiphysis or joint surface of a bone.
- hereditary multiple exostoses [MIM*133700] a disturbance of enchondral bone growth in which multiple, generally benign osteochondromas of long bones appear during childhood, commonly with shortening of the radius and fibula; the skull is not involved; the ill effects are usually mechanical but malignant change is rare; autosomal dominant inheritance with genetic heterogeneity of which some cases are due to mutation in the e.-1 gene (EXT1) on 8q. SYN: hereditary deforming chondrodystrophy (1), multiple e., osteochondromatosis.
- ivory e. a small, rounded, eburnated tumor arising from a bone, usually one of the cranial bones.
- multiple e. SYN: hereditary multiple exostoses.
- subungual e. painful osseous outgrowths that elevate the nail of the great toe or fingers in young people.

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ex·os·to·sis .ek-(.)säs-'tō-səs n, pl -to·ses -.sēz a spur or bony outgrowth from a bone or the root of a tooth
ex·os·tot·ic -'tät-ik adj

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n.
a benign outgrowth of bone with a cap of cartilage, arising from the surface of a bone. See osteoma.

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ex·os·to·sis (ek″sos-toґsis) [ex- + ostosis] 1. a benign bony growth projecting outward from the surface of a bone. 2. osteochondroma.

Exostosis at the metatarsocuneiform joint.


Medical dictionary. 2011.

Look at other dictionaries:

  • exostosis — f. anat. patol. Hipertrofia que se desarrolla en la superficie de los huesos o dientes. Cuando se produce una hipertrofia múltiple, se trata de una enfermedad hereditaria de carácter dominante. Medical Dictionary. 2011. exostosis …   Diccionario médico

  • exostosis — [eks΄äs tō′sis] n. pl. exostoses [ek΄säs tō′sēz΄] [ModL < Gr exostōsis < ex , outside + osteon, a bone: see OSTEO ] an abnormal bony growth on the surface of a bone or tooth …   English World dictionary

  • Exostosis — Ex os*to sis, n. [NL., fr. Gr. ?; ? out + ? bone: cf. F ? exostose.] 1. (Med.) Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone. Coxe. [1913 Webster] 2. (Bot.) A knot formed upon or in the wood of… …   The Collaborative International Dictionary of English

  • Exostosis — Exostosis, griech., Knochenauswuchs …   Herders Conversations-Lexikon

  • Exostosis — Infobox Disease Name = PAGENAME Caption = DiseasesDB = 18621 ICD10 = ICD9 = ICD9|726.91 ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D005096An exostosis (plural: exostoses) is the formation of new bone on the surface of a …   Wikipedia

  • exostosis — noun (plural exostoses) Etymology: New Latin, from Greek exostōsis, from ex out of + osteon bone more at ex , osseous Date: 1736 a spur or bony outgrowth from a bone or the root of a tooth …   New Collegiate Dictionary

  • exostosis — exostosed, adj. exostotic /ek so stot ik, seuh /, adj. /ek so stoh sis, seuh /, n., pl. exostoses / seez/. Pathol. the abnormal formation of a bony growth on a bone or tooth. [1730 40; < NL < Gk exóstosis an outgrowth. See EX 3, OSTOSIS] * * * …   Universalium

  • exóstosis — ► sustantivo femenino MEDICINA Prominencia que aparece en un hueso por un golpe, una inflamación u otro trastorno. IRREG. plural exóstosis …   Enciclopedia Universal

  • Exostosis — kaulo išauga statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Exostosis ryšiai: platesnis terminas – griaučių ydos siauresnis terminas – kaulinio audinio vešėjimas siauresnis terminas – kaulų suaugimas… …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Exostosis — kaulo išauga statusas T sritis embriologija atitikmenys: lot. Exostosis ryšiai: platesnis terminas – griaučių ydos siauresnis terminas – kaulinio audinio vešėjimas siauresnis terminas – kaulų suaugimas siauresnis terminas – kūno dalių peraugimas… …   Medicininės histologijos ir embriologijos vardynas

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