Fact-sheet: Chondroblastoma


Updated on 12/18/2018 at 8:56 AM

Note : 0/10
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Definition

Chondroblastoma (Codman tumor) is a rare benign epiphyseal cartilaginous tumor occurring in young patients

Clinical features

< 1% of all primary bone tumors overall, generally occurring before age 20

male predilection

Radiography

Well-defined ovoid or lobulated osteolytic lesion, with thin peripheral sclerosis, eccentric within the epiphysis of a long bone (femur, humerus, tibia, or within an apophysis)

Internal calcifications (40-60%)

Joint effusion (1/3)

Size: 1-10 cm

CT

Better delineation of margins and relationships with the articular cartilage and metaphysis.

Periosteal reaction (50%)

Internal calcifications (40-60%)

Possible endosteal scalloping and cortical breakthrough

MRI

Reference examination.

Perilesional edema +++

Cartilaginous matrix:

  • T1: Hypointense - Intermediate signal
  • T2FS/STIR: Intermediate signal - hyperintense
  • Occasional fluid-fluid levels, given the potential association with aneurysmal bone cyst