Discoid medial meniscus with horizontal tear

Case contributed by Yaïr Glick
Diagnosis certain


Knee pain. Suspected meniscal tear on bone scintigraphy.

Patient Data

Age: 18 years
Gender: Male

Incomplete discoid medial meniscus. Meniscal cyst along anterior horn. Fine horizontal tear in meniscal body. Medial parameniscal cyst, slightly displacing the MCL. Small cyst in posterior meniscal root (insertional cyst).
Lateral meniscus of normal shape, height and signal.
ACL, PCL, MCL, LCL, quadriceps and patellar tendons of normal thickness, course and signal.
Osseous and joint structures of normal appearance. Muscle layers, fat planes, skin and subcutaneous layer of normal appearance.

Case Discussion

An unusual case of incomplete discoid medial meniscus with a horizontal tear, as the discoid meniscus variant usually affects the lateral meniscus.

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