A Reliable, Ultrasound-Based Method for the Diagnosis of Discoid Lateral Meniscus

PurposeTo explore the feasibility and validity of ultrasound in diagnosis discoid lateral meniscus (DLM) by comparing quantitatively morphologic difference between DLM normal meniscus.MethodsThis study was designed to develop validate diagnostic criterion for DLM. In development stage (July 2018 June 2019), data from 180 subjects were used derive criterion, including 90 patients diagnosed as magnetic resonance imaging (DLM group) matched controls (control group). Twelve distinct parameters thickness, width, 0.5∗thickness/width, angle obtained through anterior, lateral, posterior views with probe oriented perpendicular tibiofemoral joint line. validation 2019 December 324 additional participants derived stage. Differences continuous variables categorical 2 groups analyzed an independent t test χ2 test, respectively. The value receiver operating characteristic curve.ResultsIn stage, significant differences found above 12 (P < .05 all). Cut-off values anterior angle, body 28.45°, 27.85°, 29.15°, area under curve, sensitivity, specificity (0.953, 95.6%, 91.1%), (0.980, 95.6%), (0.942, 80.0%, 97.8%) greater than other parameters. specificity, accuracy diagnosing high 91.3%, 88.6%, 89.2%; 94.2%, 93.3%, 93.5%; 76.8%, 95.7%, 91.7%.ConclusionsDLM can be reliably measurements meniscal angle.Level EvidenceLevel III, case-control study. To meniscus. This curve. 91.7%. angle.