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Case Reports
. 2011 Feb;19(2):192-5.
doi: 10.1007/s00167-010-1199-9. Epub 2010 Jun 22.

Anterior lateral meniscofemoral ligament with congenital absence of the ACL

Alcindo Silva  1 , Ricardo Sampaio
Affiliations
Case Reports

Anterior lateral meniscofemoral ligament with congenital absence of the ACL

Alcindo Silva et al. Knee Surg Sports Traumatol Arthrosc. 2011 Feb.

Abstract

Purpose: to describe agenesis of the anterior cruciate ligament (ACL) with an anterior lateral meniscofemoral ligament.

Methods and results: case report of a 13-year-old girl with an absent ACL and with an anterior lateral meniscofemoral ligament instead, as well as absence of the anterior insertion of the lateral meniscus in the tibia and a discoid ring-like lateral meniscus, with hypoplasia of the lateral femoral condyle. At arthroscopy, the anterior lateral meniscofemoral ligament was found to arise from the anterior horn of the lateral meniscus and insert into the posterolateral aspect of the intercondylar notch, mimicking the course of the native ACL on magnetic resonance imaging (MRI).

Conclusion: ACL agenesis may be associated with an anomalous anterior lateral meniscofemoral ligament that may mimic a normal ACL on MRI.

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