Knee pain and instability Entry posted by Ian Wong August 15, 2014 1,913 views Share More sharing options... Followers 1 Young patient, post-injury. What's the finding? Hoowin 1 Report Entry
frozenarbitor 23 Posted August 15, 2014 Report Share Can't see ACL in 1 slice. ACL tear? I think the medial meniscus is also torn. Quote Link to comment
Depression 20 Posted August 21, 2014 Report Share Looks like an acute ACL tear. Maybe also an LCL injury. Quote Link to comment
Ian Wong 111 Posted August 27, 2014 Report Share Hi all, This radiologic sign is known as the "Double PCL sign." This is diagnostic of a bucket-handle tear of a meniscus, usually the medial meniscus, which is flipped into a position where it lies anterior to the PCL, and mimicks the appearance of a second PCL. In the above image, there is a curvilinear black structure originating from the distal femur, and then extending posteriorly and inferiorly to insert on the posterior aspect of the proximal tibia. This structure is the PCL. Just anterior to the PCL is a second, flatter, curvilinear structure interposed between the distal femur and proximal tibia. This is the torn meniscus. On this single image, it is impossible to tell which meniscus it is, but usually it is the medial meniscus, and it would be evident when you are shown the remaining MRI images. Here's the Radiopedia article for the "Double PCL sign." http://radiopaedia.org/articles/double-pcl-sign frozenarbitor and TheFancyPanda, The ACL is only seen on a few slices in the sagittal plane, and I haven't shown you any of those images. So unfortunately, on the single image provided, no comment can be made on the ACL. Similarly, the LCL complex is not included in the above image, and also therefore is of unknown status. ukmedstudent and Hoowin 2 Quote Link to comment
nino 14 Posted September 7, 2014 Report Share Nice blog, please keep them coming. Quote Link to comment
Hoowin 2 Posted June 26, 2015 Report Share Would you mind make a mark on the free part (or the detached end) of PCL on the pic? Quote Link to comment
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