Medial collateral ligament injury grading

Medial collateral ligament (MCL) injuries are graded into three groups on MRI, much in the same way as many other ligaments:

  • grade 1: (minor sprain) high signal is seen medial (superficial) to the ligament, which looks normal
  • grade 2: (severe sprain or partial tear) high signal is seen medial to the ligament, with high signal or partial disruption of the ligament
  • grade 3: complete disruption of the ligament

As a general rule, the MCL is not repaired in the general population if it is an isolated injury. In athletes, grade 3 injuries often require surgical repair 1.

After a few weeks it may appear as a Pellegrini-Stieda syndrome or a Pellegrini-Stieda (PS) lesion, a post-traumatic/post-avulsion calcification of the proximal medial collateral ligament.

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Article Information

rID: 10926
Synonyms or Alternate Spellings:
  • MCL injury grading
  • Grading of medial knee collateral ligament injury

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