Rim sign of avascular necrosis

The rim sign comprises a high T2 or intermediate T1 signal line sandwiched between two low signal lines, and represents fluid between sclerotic borders of an osteochondral fragment, and implies instability (stage III).

The rim sign should not be confused with the double line sign of osteonecrosis/AVN.

See also

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Article Information

rID: 1987
Section: Signs
Tag: knee
Synonyms or Alternate Spellings:
  • The rim sign of AVN
  • Rim sign (AVN)
  • Rim sign of AVN

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