Hypermobiler lateraler Meniskus: Anatomie, Diagnose und Behandlungsoptionen

A hypermobile lateral meniscus is a rare and often overlooked cause of posterolateral knee pain or locking of the knee joint. This pathology can be characterized by an isolated injury of the popliteomeniscal fascicle (PMF), can be associated with anterior cruciate ligament injuries or with disruption of the PMF complex. Injuries to the PMF are commonly underrecognized both clinically and on imaging studies. The absence of clinical or magnetic resonance imaging (MRI) findings with no evident meniscal or articular cartilage abnormality may lead to delayed and often missed diagnosis. Lateral meniscus hypermobility has been defined arthroscopically as the point where the lateral meniscus overrides the lowest point of the lateral femoral condyle. The purpose of this review is to explain the pathology, to describe the anatomy and imaging findings and to present suggestions for diagnostic and treatment options.