Synonym for ecchondroma ... <tumour> 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. ... Synonym: ecchondrosis. ... Origin: G. ... Found on http://www.encyclo.co.uk/local/20973