ReportFoundry - RSNA Knee MRI Challenge

Case 393

assigned

Report English

Medial Compartment: Normal bone marrow signal. Intact cartilage. Intact medial meniscus. Intact MCL. Status post MPFL tightening with corresponding scar changes. No rupture. Lateral Compartment: Normal bone marrow signal with red marrow islands in the femoral metadiaphysis. Bony irregularities on the lateral femoral condyle with a focal cartilage defect extending to subchondral areas posterofemorally, with an adjacent small subchondral debris cyst (Outerbridge Grade IV). Intact lateral meniscus. Small parameniscal cyst adjacent to the anterior horn of the lateral meniscus. Intact LCL. Intact LPFL. Patellofemoral Joint and Patella: Normal bone marrow signal. Intact cartilage. Normal appearance of the patellar ligament. Cruciate Ligaments: Intact ACL and PCL. Musculature and Soft Tissues: Slightly accentuated joint fluid. Fabella. Scar changes post MPFL tightening. Likely bony contour irregularities at the site of a refixed osteochondral fracture on the lateral femoral condyle and focally highly thinned cartilage cover. No clear evidence of a full-thickness cartilage defect, no subchondral stress reaction/bone marrow edema formation. Menisci, cruciate, and collateral ligaments intact. Slightly accentuated joint fluid.

Report English Structured

## ACL * Intact ACL and PCL. * Menisci, cruciate, and collateral ligaments intact. ## MCL * Intact MCL. * Menisci, cruciate, and collateral ligaments intact. ## Medial Meniscus * Intact medial meniscus. * Menisci, cruciate, and collateral ligaments intact. ## Lateral Meniscus * Intact lateral meniscus. * Small parameniscal cyst adjacent to the anterior horn of the lateral meniscus. * Menisci, cruciate, and collateral ligaments intact. ## Medial OA * Intact cartilage. ## Lateral OA * Bony irregularities on the lateral femoral condyle with a focal cartilage defect extending to subchondral areas posterofemorally, with an adjacent small subchondral debris cyst (Outerbridge Grade IV). * Likely bony contour irregularities at the site of a refixed osteochondral fracture on the lateral femoral condyle and focally highly thinned cartilage cover. * No clear evidence of a full-thickness cartilage defect, no subchondral stress reaction/bone marrow edema formation. ## PF OA * Intact cartilage. ## Effusion * Slightly accentuated joint fluid. * Slightly accentuated joint fluid. ## Synovitis * [N/A] ## Baker's Cyst * [N/A] ## Contusion * Normal bone marrow signal. * Normal bone marrow signal with red marrow islands in the femoral metadiaphysis. * Normal bone marrow signal. * no subchondral stress reaction/bone marrow edema formation. ## Fracture * Likely bony contour irregularities at the site of a refixed osteochondral fracture on the lateral femoral condyle and focally highly thinned cartilage cover.

## ACL
* Intact ACL and PCL.
* Menisci, cruciate, and collateral ligaments intact.

## MCL
* Intact MCL.
* Menisci, cruciate, and collateral ligaments intact.

## Medial Meniscus
* Intact medial meniscus.
* Menisci, cruciate, and collateral ligaments intact.

## Lateral Meniscus
* Intact lateral meniscus.
* Small parameniscal cyst adjacent to the anterior horn of the lateral meniscus.
* Menisci, cruciate, and collateral ligaments intact.

## Medial OA
* Intact cartilage.

## Lateral OA
* Bony irregularities on the lateral femoral condyle with a focal cartilage defect extending to subchondral areas posterofemorally, with an adjacent small subchondral debris cyst (Outerbridge Grade IV).
* Likely bony contour irregularities at the site of a refixed osteochondral fracture on the lateral femoral condyle and focally highly thinned cartilage cover.
* No clear evidence of a full-thickness cartilage defect, no subchondral stress reaction/bone marrow edema formation.

## PF OA
* Intact cartilage.

## Effusion
* Slightly accentuated joint fluid.
* Slightly accentuated joint fluid.

## Synovitis
* [N/A]

## Baker's Cyst
* [N/A]

## Contusion
* Normal bone marrow signal.
* Normal bone marrow signal with red marrow islands in the femoral metadiaphysis.
* Normal bone marrow signal.
* no subchondral stress reaction/bone marrow edema formation.

## Fracture
* Likely bony contour irregularities at the site of a refixed osteochondral fracture on the lateral femoral condyle and focally highly thinned cartilage cover.

Findings

None

Saved.