American Heritage® Dictionary of the English Language, Fourth Edition
- n. A bony growth on the surface of a bone or tooth.
Century Dictionary and Cyclopedia
- n. In pathology, a morbid bony growth on the surface of a bone, arising from bone, periosteum, or articular or epiphyseal cartilage.
- n. In botany, the formation of woody, wart-like excrescences upon the stems or roots of plants.
GNU Webster's 1913
- n. (Med.) Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone.
- n. (Bot.) A knot formed upon or in the wood of trees by disease.
- n. a benign outgrowth from a bone (usually covered with cartilage)
- From ex- + Ancient Greek ὀστέον (osteon, "bone"). (Wiktionary)
- Greek exostōsis : ex-, out of; see exo- + osteon, bone; see ost- in Indo-European roots + -ōsis, -osis. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Ringbone is the designation of the exostosis which is found on the coronet and in the digital and phalangeal regions.”
“Congenital deformity had given his face a crazed top-heaviness, for while he was so undershot that his upper gum hung in air, his forehead was so distended by exostosis that it all but hid his eyes.”
“Hallux valgus, if severe and associated with marked exostosis or bunion.”
“Later, unless an unusually large exostosis is formed, which may cause a constant irritation due to its size and juxtaposition to the carpus, lameness is discontinued.”
“It is a misnomer, in a sense, and the veterinarian is frequently obliged to spend considerable time with his clients in order to convince them that a spherodial exostosis of the proximal phalanx, in certain cases, is in reality "ringbone," even though there exists no exostosis which completely encircles the affected bone.”
“Periarticular ringbone may, because of the size and location of the exostosis, constitute a condition which cannot be relieved in any way in one case, and in another, because of the manner of distribution of such osseous deposits, the condition may be such that prompt recovery will follow proper treatment.”
“By observing the internal surface of the hock from various suitable angles, such as from between the forelegs or directly behind the subject, one may note the presence of any ordinary exostosis.”
“If situated rather high and extending anterior to the hock, there is less likelihood of recovery resulting than where an exostosis is confined to the lower row of tarsal bones.”
“Lameness usually precedes the formation of exostosis, though cases are observed wherein an exostosis is present and no lameness is manifested and no history of the previous existence of lameness is available.”
“In _articular_ ringbone as soon as there is developed an exostosis, it occupies a position on the dorsal (anterior) part of the articulation and extends around the sides of the joint.”
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