multiple cartilaginous e's

exostosis /ex·os·to·sis/ (ek″sos-to´sis)

1. a benign bony growth projecting outward from a bone surface.

exostosis cartilagi´nea a variety of osteoma consisting of a layer of cartilage developing beneath the periosteum of a bone.

ivory exostosis compact osteoma.

multiple exostoses an inherited condition in which multiple cartilaginous or osteocartilaginous excrescences grow out from the cortical surfaces of long bones.

subungual exostosis a cartilage-capped reactive bone spur occurring on the distal phalanx, usually of the great toe.

ex·os·to·sis (

-st

n. pl. -ses (-s

A projection that is capped by cartilage and arises from a bone that develops from cartilage. Also called hyperostosis, poroma.

exostosis

[ek′sostō′sis]

Etymology: Gk, exo + osteon, bone

an abnormal benign growth on the surface of a bone. Also called hyperostosis. exostosed, exostotic, adj.

exostosis [ek″sos-to´sis] (Gr.)

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.

exostosis (pl. exostoses) (ek´sos-tō´sis),

n (hyperostosis) a bony growth projecting from a bony surface.

Mandibular tori exostosis.

exostosis

pl. exostoses [Gr.] a benign new growth projecting from a bone surface and characteristically capped by cartilage.

exostosis cartilaginea

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.

periarticular exostosis

occurs in any joint injury, commencing as cartilaginous osteophytes within a few days of the injury occurring.

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