Figure 14.

Tear of the posterior horn of the lateral meniscus.

Sagittal FS T2-WI at the posterior horn of the lateral meniscus on adjacent slices (A and B) shows a fluid-filled tear at the insertion of the posterior meniscofemoral ligament at the inner third of the posterior horn of the lateral meniscus (black arrow). Note also bone marrow edema in the middle third of the lateral femoral condyle and posterolateral tibia due to an ACL tear (not shown on these images). Axial FS T2-WI (C) shows an irregularly delineated tear at the periphery of the inner third of the posterior horn of the lateral meniscus with presence of the so-called zip sign (black arrow).