Presentation
Right knee pain and swelling after falling and landing on the right knee.
Patient Data
MRI of the right knee shows a complete tear of the anterior cruciate ligament with corresponding bone contusion pattern.
There is a predominantly longitudinal tear of the posterior horn of the medial meniscus with extension into the body.
There is a peripheral longitudinal tear of the posterior horn of the lateral meniscus (Wrisberg rip, Wrisberg rip) at the attachment of the ligament of Wrisberg (Ligament of Wrisberg, Ligament of Wrisberg).
Case Discussion
It can be challenging to distinguish between a Wrisberg rip and a Wrisberg pseudotear due to a cleft that is normally present at the insertion of the ligament of Wrisberg on the posterior horn of the lateral meniscus. It has been suggested that the ligament of Wrisberg normally attaches to the posterior horn of the lateral meniscus within 14 mm lateral to the lateral edge of the PCL ². Hence, extension of a cleft beyond this amount is highly suspicious for a tear.
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