osteochondral injury staging

Osteochondral injury staging system for MRI attempts to grade the stability and severity of osteochondral injury and is used to plan management.

• stage I
  • injury limited to articular cartilage
  • MRI findings: subchondral edema
  • x-ray findings: none
• stage II
  • cartilage injury with associated subchondral fracture but without detachment
  • thin sclerotic margin
  • x-ray findings: usually none; may see fracture as sclerotic or osteopenic area
  • two subtypes
    • type A: cystic on CT and/or edema on MRI
    • type B: non-displaced and incompletely undercut by fluid (MR) or lucency (CT), with an open connection to the articular cartilage (essentially 2a without edema on MRI)
• stage III
  • detached, non-displaced fragment
  • MRI findings: high signal around osteochondral fracture (rim sign) but not displaced
  • x-ray findings: slight lucency between osteochondral fragment and remainder of the bone
• stage IV
  • osteochondral fragment displaced
  • usually joint effusion present, surrounding fragment and filling donor site
  • x-ray findings: increased lucency between osteochondral fragment and remainder of the bone, or loose body with donor site irregularity
• stage V
  • subchondral cyst formation
  • secondary degenerative change
  • x-ray findings: secondary osteoarthritis

See also

• osteochondral defects
• chondromalacia grading

Siehe auch:

• rim sign
• osteochondrale Verletzungen

und weiter:

• Osteochondrosis dissecans
• Chondropathie Stadieneinteilung
• Chondromalacia patellae Einteilung