Publication date: Available online 1 January 2018
Source:European Journal of Radiology
Author(s): Anagha P. Parkar, Kristiane Bleskestad, Susanne Løken, Miraude Eapm Adriaensen, Eirik Solheim
Backgroundto examine if PROTruding of the Anterior Medial Meniscus (PROTAMM) could be an indirect sign of PCL deficiency by comparing PROTAMM to passive posterior tibial sagging (PSS) for chronic PCL rupture on routine MRI.MethodsPatients with PCL reconstruction between 2011-2016 were included in a case control study. Primarily cases with combined ACL/PCL injury were excluded. Secondary exclusion criteria were bony fractures, medial meniscus pathology and poor quality MRIs.Three (blinded) observers reviewed the pre-operative MRIs according to a pre-defined protocol.ResultsAfter applying the inclusion and primary exclusion criteria 16 patients were identified in the PCL rupture group. The control group consisted of 15 patients. After reviewing the MRIs, 6 were excluded due secondary exclusion criteria.Mean PPS measured 4.8 mm (± 4.4 mm) in the PCL rupture group and 1.8 mm (±2.9 mm) in the control group, p = 0.05. Mean PROTAMM was 3.6 mm (±0.6 mm) in the PCL rupture group and 0.7 mm (±0.9 mm) in the control group, p = 0.004.ConclusionWe found a mean PROTAMM of 3.6 mm in patients with PCL rupture. We suggest that this sign, after knee injury in an otherwise normal medial meniscus, is a promising indirect sign of PCL deficiency compared to PPS. Implementation of this sign in clinical practice may improve the sensitivity of routine non-weight bearing MRI in identifying PCL deficient knees.
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Δευτέρα 1 Ιανουαρίου 2018
Protruding anterior medial meniscus–An indirect sign of posterior cruciate ligament deficiency.
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