ReportFoundry - RSNA Knee MRI Challenge

Case 139

assigned

Report English

Normal articulation in the left knee joint. Small insertion cysts at the eminence and the left femoral condyle (5/21 and 5/18) with surrounding mild edema. Also, small debris cysts and subcortical edema in the medial femoral condyle and on the medial tibial plateau. Otherwise, unremarkable bone marrow signal. Patella centered in position. Several moderate chondral lesions retropatellar, exemplified at the ridge (4/12). Also, at least moderate chondropathy in the trochlea (4/12). Medially femorotibial at the posterior horn, significantly reduced substance and extruded residual meniscus (5/20) with completely worn cartilage layer (5/20). The anterior horn of the lateral meniscus shows significantly increased signal (6/24). Laterally, in the main load-bearing zone, the cartilage layer is also thinned. Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas. ACL and PCL intact. LCL unremarkable. Adjacent to the MCL, a narrow fluid margin, differential diagnosis due to irritation. Joint effusion. Multiple villous synovial proliferations. Baker's cyst. Unremarkable depiction of the surrounding musculature and subcutis. Medial advanced pan-gonarthrosis with medially completely worn cartilage layer with adjacent reactive edema, moderate femoropatellar chondropathy, and lateral femorotibial with respective osteophytic formations. Following medial meniscus surgery, it is significantly reduced in substance at the posterior horn, extruded, and frayed at the anterior horn. The anterior horn of the lateral meniscus is also significantly increased in signal and beginning to fray. Irritation of the MCL. Cruciate ligaments intact. Joint effusion with multiple villous synovial proliferations, differential diagnosis due to reactive synovitis. Baker's cyst.

Report English Structured

## ACL * ACL and PCL intact. * Cruciate ligaments intact. ## MCL * Adjacent to the MCL, a narrow fluid margin, differential diagnosis due to irritation. * Irritation of the MCL. ## Medial Meniscus * Medially femorotibial at the posterior horn, significantly reduced substance and extruded residual meniscus (5/20). * Following medial meniscus surgery, it is significantly reduced in substance at the posterior horn, extruded, and frayed at the anterior horn. ## Lateral Meniscus * The anterior horn of the lateral meniscus shows significantly increased signal (6/24). * The anterior horn of the lateral meniscus is also significantly increased in signal and beginning to fray. ## Medial OA * Medially femorotibial at the posterior horn... with completely worn cartilage layer (5/20). * Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas. * Medial advanced pan-gonarthrosis with medially completely worn cartilage layer with adjacent reactive edema. ## Lateral OA * Laterally, in the main load-bearing zone, the cartilage layer is also thinned. * Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas. * lateral femorotibial with respective osteophytic formations. ## PF OA * Several moderate chondral lesions retropatellar, exemplified at the ridge (4/12). * Also, at least moderate chondropathy in the trochlea (4/12). * Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas. * moderate femoropatellar chondropathy. ## Effusion * Joint effusion. * Joint effusion with multiple villous synovial proliferations, differential diagnosis due to reactive synovitis. ## Synovitis * Multiple villous synovial proliferations. * Joint effusion with multiple villous synovial proliferations, differential diagnosis due to reactive synovitis. ## Baker's Cyst * Baker's cyst. * Baker's cyst. ## Contusion * [N/A] ## Fracture * [N/A]

## ACL
* ACL and PCL intact.
* Cruciate ligaments intact.

## MCL
* Adjacent to the MCL, a narrow fluid margin, differential diagnosis due to irritation.
* Irritation of the MCL.

## Medial Meniscus
* Medially femorotibial at the posterior horn, significantly reduced substance and extruded residual meniscus (5/20).
* Following medial meniscus surgery, it is significantly reduced in substance at the posterior horn, extruded, and frayed at the anterior horn.

## Lateral Meniscus
* The anterior horn of the lateral meniscus shows significantly increased signal (6/24).
* The anterior horn of the lateral meniscus is also significantly increased in signal and beginning to fray.

## Medial OA
* Medially femorotibial at the posterior horn... with completely worn cartilage layer (5/20).
* Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas.
* Medial advanced pan-gonarthrosis with medially completely worn cartilage layer with adjacent reactive edema.

## Lateral OA
* Laterally, in the main load-bearing zone, the cartilage layer is also thinned.
* Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas.
* lateral femorotibial with respective osteophytic formations.

## PF OA
* Several moderate chondral lesions retropatellar, exemplified at the ridge (4/12).
* Also, at least moderate chondropathy in the trochlea (4/12).
* Significant osteophytic formations on the femoral and tibial as well as femoropatellar areas.
* moderate femoropatellar chondropathy.

## Effusion
* Joint effusion.
* Joint effusion with multiple villous synovial proliferations, differential diagnosis due to reactive synovitis.

## Synovitis
* Multiple villous synovial proliferations.
* Joint effusion with multiple villous synovial proliferations, differential diagnosis due to reactive synovitis.

## Baker's Cyst
* Baker's cyst.
* Baker's cyst.

## Contusion
* [N/A]

## Fracture
* [N/A]

Findings

None

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