ReportFoundry - RSNA Knee MRI Challenge

## ACL * Cruciate ligaments are also intact. ## MCL * Collateral ligament apparatus intact. ## Medial Meniscus * The medial meniscus is intact. * Faint signal increases at the posterior horn in the proton-weighted sequence (see 5/10). * Medial meniscus intact with discrete mucoid degeneration of the posterior horn. ## Lateral Meniscus * Postoperative changes of the lateral meniscus with missing anterior horn after resection. * The remaining posterior horn shows no signs of tearing. * Postoperative changes of the lateral meniscus after anterior horn resection. * In the remaining portions, no evidence of recurrent tearing. ## Medial OA * Mild osteophytic formations femorotibially. * Femorotibially at the medial femoral condyle, compared to the previous examination, there is a progressive, currently full-thickness focal cartilage defect of approximately 5 mm (4/19 or 6/10) with subchondral T2 signal increase, differential diagnosis includes partial delamination. * Otherwise, largely unchanged focal partially calcified cartilage defect at the medial femoral condyle (5/15 or 1010/54), currently with cortical sclerosis without evidence of bone edema. * Compared to the previous examination, progressive, currently full-thickness focal cartilage defect of approximately 5 mm (4/19 or 6/10) with suspicion of partial delamination at the medial femoral condyle (4/19 or 6/10). * Unchanged small focal deep cartilage defect anteriorly at the medial femoral condyle (5/15), with increased sclerosis of the underlying cortex and fully regressed edema. * Initial osteoarthritis with small osteophytic extensions. ## Lateral OA * Mild osteophytic formations femorotibially. * Initial osteoarthritis with small osteophytic extensions. ## Patellofemoral (PF) OA * Mild osteophytic formations at the upper and lower poles of the patella. * Unremarkable cartilage covering femoropatellar. * Initial osteoarthritis with small osteophytic extensions. ## Effusion * Moderate joint effusion. ## Synovitis * Slight synovial proliferations, differential diagnosis includes reactive synovitis. ## Baker's Cyst * [N/A] ## Contusion * No bone edema with overall age-appropriate bone marrow signal. * currently with cortical sclerosis without evidence of bone edema. * with increased sclerosis of the underlying cortex and fully regressed edema. ## Fracture * [N/A]

## ACL
* Cruciate ligaments are also intact.

## MCL
* Collateral ligament apparatus intact.

## Medial Meniscus
* The medial meniscus is intact.
* Faint signal increases at the posterior horn in the proton-weighted sequence (see 5/10).
* Medial meniscus intact with discrete mucoid degeneration of the posterior horn.

## Lateral Meniscus
* Postoperative changes of the lateral meniscus with missing anterior horn after resection.
* The remaining posterior horn shows no signs of tearing.
* Postoperative changes of the lateral meniscus after anterior horn resection.
* In the remaining portions, no evidence of recurrent tearing.

## Medial OA
* Mild osteophytic formations femorotibially.
* Femorotibially at the medial femoral condyle, compared to the previous examination, there is a progressive, currently full-thickness focal cartilage defect of approximately 5 mm (4/19 or 6/10) with subchondral T2 signal increase, differential diagnosis includes partial delamination.
* Otherwise, largely unchanged focal partially calcified cartilage defect at the medial femoral condyle (5/15 or 1010/54), currently with cortical sclerosis without evidence of bone edema.
* Compared to the previous examination, progressive, currently full-thickness focal cartilage defect of approximately 5 mm (4/19 or 6/10) with suspicion of partial delamination at the medial femoral condyle (4/19 or 6/10).
* Unchanged small focal deep cartilage defect anteriorly at the medial femoral condyle (5/15), with increased sclerosis of the underlying cortex and fully regressed edema.
* Initial osteoarthritis with small osteophytic extensions.

## Lateral OA
* Mild osteophytic formations femorotibially.
* Initial osteoarthritis with small osteophytic extensions.

## Patellofemoral (PF) OA
* Mild osteophytic formations at the upper and lower poles of the patella.
* Unremarkable cartilage covering femoropatellar.
* Initial osteoarthritis with small osteophytic extensions.

## Effusion
* Moderate joint effusion.

## Synovitis
* Slight synovial proliferations, differential diagnosis includes reactive synovitis.

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

## Contusion
* No bone edema with overall age-appropriate bone marrow signal.
* currently with cortical sclerosis without evidence of bone edema.
* with increased sclerosis of the underlying cortex and fully regressed edema.

## Fracture
* [N/A]