Pediatric Chondroblastoma

  • Etiology: Benign cartilaginous neoplasm
  • Imaging:
    — Location: Eccentric in epiphysis of long bones or in apophysis
    — Lytic or blastic: Lytic with thin sclerotic rim with intralesional calcification in 50%
    — Matrix: Chondroid
    — Zone of transition: Narrow
    — Periosteal new bone or cortical destruction: Periosteal new bone distant to lesion is distinctive amongst epiphyseal lesions
    — Additionally:
  • DDX: Lucent bone lesions that extend to epiphysis are chondroblastoma, chondrosarcoma, giant cell tumor, osteomyelitis
  • Complications:
  • Treatment: Surgical
  • Clinical:

Radiology 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.
Radiograph of chondroblastoma
AP radiograph of the knee shows a lytic lesion centered in the tibial epiphysis and extending into the metaphysis that has a thin sclerotic rim and a hint of intralesional calcification. The lesion has a narrow zone of transition and has no periosteal new bone associated with it.