Mucoid degeneration of the ACL
60 years old male with chronic knee pain. No history of trauma.
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- mucoid degeneration of the ACL with increased signal intensity alternating with its normal hypointense fibers giving the characteristic "celery stalk appearance".
- mild degenerative changes of the articular cartilage with mild subchondral degenerative marrow changes.
- degenerative tear of the PHMM with increased intra-meniscal signal with disruption of the articular surface. Intact AHMM and lateral meniscus .
- intact PCL and collateral ligaments.
- mild joint effusion.
Features consistent of mucoid degeneration of the ACL. There is also degenerative joint disease with mild joint effusion as well as degenerative tear of the PHMM.