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ORIGINAL ARTICLE
Year : 2019  |  Volume : 3  |  Issue : 2  |  Page : 209-215

High-Resolution ultrasound of knee osteoarthritis in a Southwest Nigerian population: Our experience


1 Department of Radiology and Orthopedic Surgery, Obafemi Awolowo University, Ile-Ife, Nigeria
2 Department of Traumatology, Obafemi Awolowo University, Ile-Ife, Nigeria

Correspondence Address:
Dr. Bolanle O Ibitoye
Department of Radiology, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife
Nigeria
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jmsr.jmsr_47_18

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Objective: High-resolution musculoskeletal ultrasound (MSKUS) is more sensitive than conventional radiography (CR) in evaluating early knee osteoarthritis (OA). The aim of this study is to determine the US findings in knee OA and also to compare these with CR, which is the gold standard. Methods: One hundred and twenty patients with primary knee OA and 120 controls were examined. They all had knee US. CR included weight-bearing anterioposterior and lateral knee radiographs. Kellgren and Lawrence (K–L) grades were assessed, and tibiofemoral joint space width was measured. Data were analyzed using SPSS Version 20. Results: Two hundred and fifteen knees had OA. US findings were tibial osteophytes (67.4%), femoral osteophytes (66.5%), effusion (61.4%), synovitis (46%), medial meniscal protrusion (38.2%), Baker's cysts (34.4%), and lateral meniscal protrusion (27.5%). US detected femoral osteophytes in 13 knees that were not detected in CR. CR detected femoral osteophytes in 12 knees, which US could not. Agreement between US and CR was 74% (P < 0.001). US detected tibial osteophytes in 10 knees which CR film could not. CR detected tibial osteophytes in 9 knees, which the US could not. Agreement between US and CR was 80% (P < 0.001). Sensitivity and specificity of US in detecting femoral and tibial osteophytes were 91.6% and 82.2% for the femur and 93.8% and 85.9% for the tibia, respectively. Student's t-test showed a significant difference (P < 0.001) between femoral condylar thickness in OA patients and controls. Conclusion: MSKUS complements CR in evaluating knee OA.


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