Chondroblastoma

  • Etiology: benign cartilaginous neoplasm
  • Imaging:
    — Location (eccentric in epiphysis or in apophysis)
    — Lytic with thin sclerotic rim with intralesional calcification in 50%
    — Matrix (chondroid)
    — Zone of transition (narrow)
    — Periosteal new bone distant to lesion is distinctive amongst epiphyseal lesion

Cases of Chondroblastoma

Radiograph of chondroblastoma of humerus
AP radiograph of the right shoulder shows a lesion in the greater tuberosity of the humerus that is lytic in appearance with some internal calcification with a thin sclerotic rim and a narrow zone of transition and no periosteal reaction.