ecchondroma

1. A cartilaginous neoplasm arising as an overgrowth from normally situated cartilage, as a mass protruding from the articular surface of a bone, in contrast to enchondroma. 2. An enchondroma which has burst through the shaft of a bone and become pedunculated. SYN: ecchondrosis. [G. ek, from, + chondros, cartilage, + -oma, tumor]

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ec·chon·dro·ma .ek-ən-'drō-mə n, pl -ma·ta -mət-ə also -mas a cartilaginous tumor projecting from bone or cartilage

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n. (pl. ecchondromata)

a benign cartilaginous tumour (see chondroma) that protrudes beyond the margins of a bone. Compare enchondroma.

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ec·chon·dro·ma (ek″on-droґmə) pl. ecchondromas, ecchondroґmata [Gr. ek out + chondroma] a hyperplastic growth of cartilage tissue developing on the surface of a cartilage or projecting under the periosteum of a bone; called also ecchondrosis.