Magnetic Resonance Imaging (MRI) of the Knee in Post Meniscal Repair and Meniscectomy

Background: The best imaging technique for post-operative knee assessment is magnetic resonance imaging (MRI). The challenge of using MRI to diagnose problems in the knee is made more challenging by surgical alterations. Therefore, reliable MRI assessment depends on the ability to distinguish between the normal post-operative MRI image of the knee elements and their anomalies. The purpose of this research was to compare the clinical result with the use of MRI to identify predicted morphological changes in the knee menisci during the first two years after arthroscopic operation. 
Methods: This cross-sectional study was carried out on 30 patients with previously undergone meniscal repaired or meniscectomy and reported having ongoing or frequent knee discomfort. All patients had extensive clinical examinations and detailed history collection, radiographical imaging and MRI. 
Results: MRI examination of the knee post operatively showed that the time needed for beginning of meniscus healing after surgery ranged from 3-6months. 27 patients (90%) had a meniscus tear in the posterior 1/3. Degenerative tears 11 (36.4%) was the most prevalent meniscal tears pattern diagnosed by MRI. No effusion occurred in 25 (83.3%) patients. Thirty cases were treated; seventeen received arthroscopic repair, and thirteen underwent resection. 11 patients (36.6%) had symptoms ranging from joint swelling or pain, restricted motion, instability/giving away, and catching/locking, whereas 19 (63.4%) were asymptomatic. 
Conclusions: Within the first two years after arthroscopic operations, MRI plays a useful role in detecting anticipated morphological alterations of the knee menisci.