Alcindo Silva1, Ricardo Sampaio. 1. Hospital Militar D. Pedro V, Avenida da Boavista, 4050-113 Porto, Portugal. alcindocsilva@gmail.com
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.
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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