Norman Mackenzie, Zehner Katie, Gardner Elizabeth
Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut.
JBJS Case Connect. 2025 Jan 24;15(1). doi: 10.2106/JBJS.CC.24.00395. eCollection 2025 Jan 1.
A 16-year-old woman presented with acute on chronic knee pain and instability following a twisting injury. The tibial insertion of the anterior cruciate ligament (ACL) was nonvisualized on magnetic resonance imaging. A cord-like ACL, originating from the lateral intercondylar notch and inserting smoothly into the anterior horn of the intact lateral meniscus, was found on arthroscopy. Her ACL was reconstructed with quadriceps tendon autograft.
We report a rare case of dysplastic ACL inserting into the lateral meniscus in a patient without obvious skeletal deformities. This pathology could be congenital or traumatic. Surgeons and radiologists should be aware of this rare variant.
一名16岁女性在扭伤后出现慢性膝关节疼痛急性发作及膝关节不稳。磁共振成像显示前交叉韧带（ACL）的胫骨附着点不可见。关节镜检查发现一条索状ACL，起自外侧髁间切迹，平滑地插入完整外侧半月板的前角。她接受了自体股四头肌肌腱ACL重建术。
我们报告了一例罕见的发育异常的ACL插入外侧半月板的病例，该患者无明显骨骼畸形。这种病理情况可能是先天性的或创伤性的。外科医生和放射科医生应了解这种罕见的变异情况。
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