Age / Sex : 45 / F

Chief complaint : Rt. knee pain

What is the name of the structure annotated with yellow arrows?


What is your diagnosis?

Two weeks later, you can see the final diagonosis with a brief discussion of this case (Please submit only one answer)

Courtesy : 김효진 (Kim, Hyo Jin), 보라매병원 (SMG-SNU Boramae Medical Center)

Anteromedial meniscofemoral ligament

Discussion

Findings
A T2 hypointense band of tissue extends from the medial aspect of the anterior horn of the medial meniscus, along the orientation of the anterior cruciate ligament, to the posteromedial aspect of the lateral femoral condyle (posterolateral wall of the intercondylar notch).
Occasionally, a similar appearance may be created by a prominent ligamentum mucosum (infrapatellar plica), but these extend from the apex of Hoffa's fat instead of the medial meniscus.
An anteromedial meniscofemoral ligament of the medial meniscus is a rare variant of the knee (~0.4%).

References
https://radiopaedia.org