ReportFoundry - RSNA Knee MRI Challenge

Case 331

assigned

Report English

Suspected suprapatellar joint effusion with partially T2 signal-reduced components, differential diagnosis hemarthrosis. Bone bruise on the lateral tibial plateau (5/18) with associated signal reduction in the PD sequences, differential diagnosis intra-articular tibial impression fracture, additional bone bruise on the lateral femoral condyle (5/22) and slightly on the medial tibial plateau (5/16). No evidence of retropatellar or trochlear chondropathy. The medial patellofemoral ligament (mPFL) and the femoropatellar band are intact. At its femoral attachment, the medial collateral ligament (MCL) shows edema-like T2-weighted signal increase and fiber disruption, differential diagnosis higher-grade partial rupture. Menisci and cruciate ligaments are intact. Trochlear dysplasia with a flattened sulcus angle of 152 degrees. Streaky bleeding in the subcutaneous tissue. The captured muscular structures show no signal alteration. Higher-grade partial rupture of the MCL on the femoral side in the anterior superficial and deep portions. Intra-articular fracture of the dorsolateral tibial plateau without intra-articular step formation. Significant bone bruise on the dorsolateral medial femoral condyle, with a possible additional non-displaced subchondral fracture. Slight bone bruise on the medial tibial plateau. Mild hemarthrosis.

Report English Structured

## ACL * Menisci and cruciate ligaments are intact. ## MCL * At its femoral attachment, the medial collateral ligament (MCL) shows edema-like T2-weighted signal increase and fiber disruption, differential diagnosis higher-grade partial rupture. * Higher-grade partial rupture of the MCL on the femoral side in the anterior superficial and deep portions. ## Medial Meniscus * Menisci and cruciate ligaments are intact. ## Lateral Meniscus * Menisci and cruciate ligaments are intact. ## Medial OA * [N/A] ## Lateral OA * [N/A] ## PF OA * No evidence of retropatellar or trochlear chondropathy. ## Effusion * Suspected suprapatellar joint effusion with partially T2 signal-reduced components, differential diagnosis hemarthrosis. * Mild hemarthrosis. ## Synovitis * [N/A] ## Baker's Cyst * [N/A] ## Contusion * Bone bruise on the lateral tibial plateau (5/18) with associated signal reduction in the PD sequences. * Additional bone bruise on the lateral femoral condyle (5/22) and slightly on the medial tibial plateau (5/16). * Significant bone bruise on the dorsolateral medial femoral condyle, with a possible additional non-displaced subchondral fracture. * Slight bone bruise on the medial tibial plateau. ## Fracture * Differential diagnosis intra-articular tibial impression fracture. * Intra-articular fracture of the dorsolateral tibial plateau without intra-articular step formation. * Possible additional non-displaced subchondral fracture.

## ACL
* Menisci and cruciate ligaments are intact.

## MCL
* At its femoral attachment, the medial collateral ligament (MCL) shows edema-like T2-weighted signal increase and fiber disruption, differential diagnosis higher-grade partial rupture.
* Higher-grade partial rupture of the MCL on the femoral side in the anterior superficial and deep portions.

## Medial Meniscus
* Menisci and cruciate ligaments are intact.

## Lateral Meniscus
* Menisci and cruciate ligaments are intact.

## Medial OA
* [N/A]

## Lateral OA
* [N/A]

## PF OA
* No evidence of retropatellar or trochlear chondropathy.

## Effusion
* Suspected suprapatellar joint effusion with partially T2 signal-reduced components, differential diagnosis hemarthrosis.
* Mild hemarthrosis.

## Synovitis
* [N/A]

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

## Contusion
* Bone bruise on the lateral tibial plateau (5/18) with associated signal reduction in the PD sequences.
* Additional bone bruise on the lateral femoral condyle (5/22) and slightly on the medial tibial plateau (5/16).
* Significant bone bruise on the dorsolateral medial femoral condyle, with a possible additional non-displaced subchondral fracture.
* Slight bone bruise on the medial tibial plateau.

## Fracture
* Differential diagnosis intra-articular tibial impression fracture.
* Intra-articular fracture of the dorsolateral tibial plateau without intra-articular step formation.
* Possible additional non-displaced subchondral fracture.

Findings

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