What is the differential diagnosis of Wrisberg rip?
Wrisberg pesudotear. It is seen as an intermediate signal between the junction of the Wrisberg ligament and posterior horn of lateral meniscus, without extension of the signal into the meniscus.
High-grade ACL tear involving the mid-part of the ACL, with malalignment of the ACL, which appears slightly less vertical than normal. Bone marrow oedema of the anterolateral aspect of the lateral femoral condyle and posterolateral aspect of the lateral tibial plateau, representing pivot-shift injury. Anterior tibial translation is noted (about 7.5 mm). Bone marrow oedema of the medial femoral condyle and medial tibial plateau is also noted (contrecoup injury).
Complex tear of the posterior horn of the medial meniscus (horizontal tear with vertical tear reaching the superior articular surface).
There is a longitudinal vertical meniscal tear extending from the junction of the ligament of Wrisberg with the posterior horn of the lateral meniscus to the posterior horn of the lateral meniscus, representing Wrisberg rip.
Horizontal fracture of the upper tibia, mainly laterally.
Signs of muscle injury of the medial head of gastrocnemius muscle, manifested by intramuscular oedema and minimal surrounding fluid.
Large amount of joint effusion.
Medial patellar plica is noted.
A superior tibio-fibular small cyst is noted.
A small PCL ganglion cyst is noted.