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Figure 3. A 19-year-old male with a sports injury. (a,b) Consecutive sagittal T2 weighted images show the anomalous insertion of the medial meniscus (AIMM; arrows) inserting from the anterior horn of the medial meniscus and attaching to the lower portion of the anterior cruciate ligament (ACL). (c,d) Arthroscopy from the anterior lateral views reveals the AIMM linked with the anterior horn medial meniscus (arrowheads). The AIMM can be separated from the ACL (arrows) by the hook.
