Case 21 - 30 year old male with knee pain after ACL reconstruction
30 year old male with right knee stiffness following ACL reconstruction.
- MR evaluation of the knee following ACL reconstruction should always include a close inspection of intercondylar notch for a cyclops lesion. These lesions can be quite small and subtle given their intermediate signal and are often best seen on proton density images. There's nothing subtle about this LARGE CYCLOPS LESION; it's even well visualized on the T2 fatsat images.
- It's easy to image how a cyclops lesion this size could limit terminal extension.
- This patient has a second, more subtle, potential cause of knee stiffness: a thickened medial patellar plica.
- A plica is a thickened infolding of the synovium, which can occur in several characteristic locations; the medial location, extending from the medial joint capsule to the infrapatellar fat pad, is the most commonly symptomatic location.
- This particular medial plica is likely symptomatic given the presence of high signal in the adjacent medial patellar cartilage.
Accession: CL0065
Study description: MR JOINT LOWER KNEE-RT
Case discussion: