exostosis cartilaginea

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 [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.

ex·os·to·sis car·ti·la·gi·n'e·a

an ossified chondroma arising from the epiphysis or joint surface of a bone.

exostosis cartilaginea

Osteochondroma, see there.