Examples of posterolateral corner (PLC) injuries that were misinterpreted as intact on pre-operative MRI. (A) Coronal fat-suppressed proton-density image shows a full-thickness tear of the iliotibial band (box), reported as intact in the original radiology report. (B) Sagittal proton-density image from a different case that demonstrates disinsertion of the biceps femoris tendon with bone marrow edema of the fibular head (box), also misreported as intact.