ecchondrosis

ec·chon·dro·ma

(ek'kon-drō'mă), 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(s): ecchondrosis [G. ek, from, + chondros, cartilage, + -oma, tumor]