ACL mucoid degeneration

Intact ACL, diffuse thickening, diffuse abnormal signal, celery stick appearance.

Microfracture

Bone contusion with Microfracture

Bipartate patella

Bipartate patella

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Salter Harris type 5 fracture

Salter Harris type 5 fracture

Radial tear with horizontal tear

Complex radial tear with horizontal tear and meniscal cyst

MRI of chondrocalcinosis?

 

The small dot like low signal in menisco-cartilage area on gradient echo MR may be secondary to chondrocalcinosis.

Partial ACL tear

 

Although ACL appears structurally intact, it is markedly replaced by increased T2 signal. There is also anterior translation of the posterolateral tibia with respect to posterolateral femur.

2 bands of ACL

Anterolateral and posteromedial bands of ACL seen as inverted V on coronal section

Chondrocalcinosis with osteoarthritis

Chondrocalcinosis with advanced osteoarthritis

Subtle chondrocalcinosis

Magnified image. Chondrocalcinosis was not so obvious on first glance.

Horizontal tear with parameniscal cyst

A typical horizontal longitudinal tear with parameniscal cyst

Chondrocalcinosis knee

Bilateral chondrocalcinosis knee

Chondrocalcinosis of knee

Commonest site. Note there are no. Osteophytes

ACL tear

Isolated ACL tear with contusions in lateral femoral and tibial condyles and medial femoral condyle.

Osteochondritis dessicans

Osteochondral injury of the medial femoral condyle posterolaterally (most common site) in a teen (most common age). Looks unstable.

Chondrocalcinosis of the knee

CPPD, or chondrocalcinosis of the knee. Slighlty unusual as the calcification is extruded in the lateral compartment.

Torn MCL

Coronal image: torn MCL

Horizontal tear of lateral meniscus

Sagittal sequence: horizontal tear of lateral meniscus - anterior horn

ACL ganglion cyst

ACL ganglion cyst/ myxoid degeneration

Tibial plateau fracture

Type 2 Schatzker tibial plateau fracture