A benign tumor arising in the epiphyses of long bones, consisting of highly cellular tissue resembling fetal cartilage.
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n.
a tumour derived from chondroblast, having the appearance of a mass of well-differentiated cartilage.
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chon·dro·blas·to·ma (kon″dro-blas-toґmə) [chondroblast + -oma] a usually benign tumor derived from immature cartilage cells, occurring primarily in the epiphyses of adolescents; it is characterized by fine, matrix-like calcifications arranged hexagonally, often resembling chicken wire, around closely packed cells.Medical dictionary. 2011.