ACL
The study showed normal alignment of left knee. There was an area of marrow edema involving the central part and medial facet of the patella of left knee, noted as hypointensity on T1W and hyperintensity on fluid sensitive sequences.
The ACL revealed nearly complete tear with ill-defined fiber and increased signal intensity. The PCL and MCL were unremarkable. There was hyperintense soft tissue swelling on fluid sensitive sequences surrounding LCL without its fiber disruption, suggestive of grade 1injury. The rest of posterolateral corner complex was intact. The medial and lateral menisci were also unremarkable.
There was a minimal focal thickening with increased signal intensity at the midsubstance of the proximal patellar tendon, just adjacent to the inferior patellar pole attachment of left knee with slightly surrounding soft tissue swelling. The rest of visualized patellar and quadriceps tendons, including patellar retinaculum and bony patella were intact. Small hyperintense fissurings at the articular cartilages of the medial and lateral patellar facets, more than 50%articular cartilage depth, couldb grade 3 chondral injury. The rest of articular cartilages of both femorotibial and patellofemoral joints were unremarkable.
Minimal amount of left knee joint effusion was noted. Suprapatellar plica was observed. Minimal soft tissue swelling around left knee was seen.
- Evidence of marrow edema, involving central part and medial facet of the patella of left knee as described.
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Nearly complete tear of the ACL of left knee.
RADIOLOGIST
- Suggestive of grade 1injury of the LCL as described.
- Suggestive of proximal patellar tendinosis or Jumper's knee, with minimal surrounding soft tissue swelling.
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Suggestive of grade 3 chondral injury at the articular cartilages of the medial and lateral patellar facets of left knee.
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Minimal amount of left knee joint effusion.
Teeranan Laohawiriyakamol M.D.