Anterior cruciate ligament (ACL) tear is a commonly encountered injury, with about 250,000 cases reported yearly in the USA alone [1]. The ACL acts as an important knee stabilizer, such that injury to this structure leads to substantial knee instability. Magnetic resonance imaging (MRI) has been the imaging staple for evaluation of the ACL and other internal derangements of the knee. Multiple imaging features have been described to diagnose direct and indirect features of ACL tear. Detection of indirect features of ACL tear can help...

Patient Data: MRI scans of the knee were retrospectively analyzed at our institution during the period from May 2017 to November 2018. The study inclusion criteria included cases of MRI detected complete ACL tears with arthroscopic confirmation. Cases that were excluded were due to concomitant PCL injury, systemic/rheumatologic diseases, and prior operation to the involved knee. MRI Technique: All MRI scans were performed using a 1.5 Tesla MR imaging system (Achieva, Philips Medical Systems, Netherlands) with the knee in extension. Support was given to the...

A total of 27 cases of complete ACL tears were included into the study after fulfilling inclusion and exclusion criteria. Mean age of patients was 34 years (range 15 to 79). No statistically significant difference in age was noted between the positive and negative wavy patellar tendon groups (p=0.354). The majority ofACL rupturesinvolvedmale patients (23:4,M:F). However, it was noted that the positive wavy patellar tendon group was predominantly female (67%).A possible explanation for this observation can be due to greater ligamentous laxity in women compared...

The wavy patellar tendon sign is associated with anterior tibial translation in patients with complete ACL rupture. It can be useful as an indirect sign of significant anterior tibial translation.

W. C. W. Tsui; Hong Kong/HK - nothing to disclose

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