Joel, sorry I forgot to post the follow up on that quiz case. It is indeed the anteromedial meniscofemoral ligament, a variant in the knee, as many of you responded (including Drs Hilary, Kyung, Cantarelli, Peduto and Loupatatzis).
The key here is to differentiate it from the infra-patellar plica. It can look similar to the infra-patellar plica on the Sagittal images. However, it is more medial in location, has a connection with the medial meniscus and does not extend to the infrapatellar fat pad.
Here is an image from rad source that illustrates this variant.
Also, attaching a PowerPoint from Dr Kyung who graciously shared his case.
Regards and thanks to all those who responded.
Tarun.
On Aug 14, 2023, at 1:37 PM,
Hi. I must have missed the follow-up discussion on this—thanks Joel Rubenstein