Caption =
DiseasesDB = 18621
ICD10 =
ICD9 = ICD9|726.91
MedlinePlus =
eMedicineSubj =
eMedicineTopic =
MeshID = D005096
An exostosis (plural: exostoses) is the formation of new bone on the surface of a bone. Exostosis can cause chronic pain ranging from mild to debilitatingly severe, depending on where they are located and what shape they are.

The overgrowth of outer ear canal bone is the body's way of protecting the ear drum from the frequent rush of cold water against it which commonly occurs with surfing. They develop over many years and result in infections, pain, plugging and hearing loss.

When used in the phrases "Cartilaginous exostosis" or "Osteocartilaginous exostosis", it is considered synonymous with Osteochondroma. Some sources consider the terms to mean the same thing even without qualifiers, but this interpretation is not universal.

Related conditions

* Surfer's Ear (Exostosis of the ear canal)
* Hereditary multiple exostoses (HME)
* Subungal exostosis
* Buccal exostosis

ee also

* Osteoma
* Bone spur


External links

* [http://ear-hearing-doctors.com The Ear and Balance Center] , The Sonos Group
* [http://MHEResearchFoundation.org MHE Research Foundation] (Multiple Hereditary Exostoses)
* (equates "Exostosis" with "osteochondroma")]

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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 — 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

  • 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 …   Medical dictionary

  • 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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