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a benign new growth projecting from a bone surface and characteristically capped by cartilage. adj., adj exostot´ic.
exostosis cartilagi´nea a variety of osteoma consisting of a layer of cartilage developing beneath the periosteum of a bone.
hereditary multiple exostosis a generally benign, hereditary disorder of enchondral growth of bone, marked by exostoses near the extremities of the diaphysis of long bones.
an ossified chondroma arising from the epiphysis or joint surface of a bone.
Etymology: Gk, ex, out, osteon, bone; L, cartilago, cartilage
an outgrowth of cartilage at the ends of long bones. Also called cartilage capped exostosis.
exostosis cartilagineaOsteochondroma, see there.
pl. exostoses [Gr.] a benign new growth projecting from a bone surface and characteristically capped by cartilage.
a variety of osteoma consisting of a layer of cartilage developing beneath the periosteum of a bone.
inherited multiple exostosis
a benign hereditary disorder in horses. The lesions are visible externally but appear to cause little inconvenience. Similar to multiple cartilaginous exostoses (see below) in dogs and cats.
multiple cartilaginous e's
multiple bony exostoses in bones formed by enchondral ossification are seen in young dogs, usually on vertebrae, ribs and long bones. Adult cats are infrequently affected, and mainly on cranial bones. The bony enlargements are painless, but may cause musculoskeletal or neurological dysfunction. Neoplastic transformation has been reported. An hereditary basis is suspected in dogs. Called also diaphyseal aclasis, metaphyseal aclasis, osteochondromatosis, and in horses, inherited multiple exostosis (see above). See also osteophyte.
occurs in any joint injury, commencing as cartilaginous osteophytes within a few days of the injury occurring.