Author/Authors :
Shimada, Yoichi Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Kijima, Hiroaki Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Miyakoshi, Naohisa Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Kasukawa, Yuji Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Ishikawa, Yoshinori Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Kinoshita, Hayato Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Suzuki, Masazumi Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Kaga, Nozomi Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Chida, Shuichi Department of Orthopedic Surgery - Akita University Graduate School of Medicine- Hondo - Akita , Japan , Ohuchi, Kentaro Akita Sports - Arthroscopy - and Knee Group (ASAKG) - Hondo - Akita - Japan , Sato, Chie Akita Sports - Arthroscopy - and Knee Group (ASAKG) - Hondo - Akita - Japan
Abstract :
Medial meniscal extrusion (MME) has attracted attention as an index of knee pain in conjunction with clinical symptomsthat could be more useful than the diagnosis of knee osteoarthritis on X-ray. However, the size of MME that would cause knee painhas not been clarified. The aim of the present study was to investigate the cut-off value of MME for knee pain.Methods.Atotalof318 knees were evaluated. The presence of current or past knee pain was confirmed by interview. Next, MME was measured usingvertical sonographic images of the medial joint spaces during weightbearing.Results. Overall, 71 knees were painful (P-group), and247 knees were not (N-group). MME was 5.9±1.8mmintheP-groupand2.9±1.5 mm in the N-group (𝑃<0.0001). Analysisof the receiver operating characteristic curve showed that the cut-off value of MME for knee pain was 4.3 mm, with sensitivity of0.8451 and specificity of 0.8502. In addition, 64% of knees without pain cases at the time of examination whose MME exceeded thiscut-off value had past knee pain.Conclusions. The sensitivity and specificity of MME for knee pain were very high with a cut-offvalue of 4.3 mm.
