Zanetti Marco, Pfirrmann Christian W A, Schmid Marius R, Romero José, Seifert Burkhardt, Hodler Juerg
Department of Radiology, Orthopedic University Hospital Balgrist, Forchstr. 340, CH-8008 Zurich, Switzerland.
AJR Am J Roentgenol. 2003 Sep;181(3):635-41. doi: 10.2214/ajr.181.3.1810635.
The purpose of this study was to evaluate the prevalence of MR abnormalities of the knee on the symptomatic and contralateral asymptomatic sides in patients with suspected meniscal tears. SUBJECTS AND METHODS. One hundred patients (mean age, 42.7 years; range, 18-73 years) referred for suspected meniscal tears were prospectively examined with MRI of both knees when the contralateral knee was asymptomatic. The prevalence of various types of meniscal tears and other MR abnormalities was determined.
Meniscal tears were found in 57 symptomatic knees and in 36 contralateral asymptomatic knees. In those 57 patients with a meniscal tear on the symptomatic side, the prevalence of asymptomatic tears in the contralateral side was 63% (36/57). Horizontal or oblique meniscal tears were found medially in 32 and laterally in 11 symptomatic knees, and medially in 29 and laterally in eight asymptomatic knees. Radial, vertical, complex, or displaced tears were found medially in 18 and laterally in five symptomatic knees, and medially in five and laterally in none of the asymptomatic knees. Collateral ligament abnormalities were found in 53 symptomatic knees and in six asymptomatic knees. Pericapsular soft-tissue abnormalities were found in 64 symptomatic and in 12 asymptomatic knees. Edema-like bone marrow abnormalities were found in 36 symptomatic and in three asymptomatic knees.
Horizontal or oblique meniscal tears are frequently encountered in both asymptomatic and symptomatic knees and may not always be related to symptoms. However, radial, vertical, complex, or displaced meniscal tears and abnormalities of the collateral ligaments, pericapsular soft tissues, and bone marrow are found almost exclusively on the symptomatic side and appear to be clinically more meaningful.
本研究旨在评估疑似半月板撕裂患者患侧膝关节及对侧无症状膝关节磁共振成像（MRI）异常的发生率。
对100例疑似半月板撕裂患者（平均年龄42.7岁；范围18 - 73岁）进行前瞻性研究，当对侧膝关节无症状时，对双侧膝关节行MRI检查。确定各种类型半月板撕裂及其他MRI异常的发生率。
在57例患侧膝关节发现半月板撕裂，在36例对侧无症状膝关节也发现半月板撕裂。在57例患侧有半月板撕裂的患者中，对侧无症状半月板撕裂的发生率为63%（36/57）。在32例患侧膝关节内侧及11例外侧发现水平或斜行半月板撕裂，在29例对侧无症状膝关节内侧及8例外侧发现水平或斜行半月板撕裂。在18例患侧膝关节内侧及5例外侧发现放射状、垂直、复杂或移位撕裂，在5例对侧无症状膝关节内侧发现放射状、垂直、复杂或移位撕裂，外侧未发现。在53例患侧膝关节及6例对侧无症状膝关节发现侧副韧带异常。在64例患侧及12例对侧无症状膝关节发现关节囊周围软组织异常。在36例患侧及3例对侧无症状膝关节发现水肿样骨髓异常。
水平或斜行半月板撕裂在无症状和有症状的膝关节中均常见，且可能并不总是与症状相关。然而，放射状、垂直、复杂或移位半月板撕裂以及侧副韧带、关节囊周围软组织和骨髓异常几乎仅在有症状侧发现，且在临床上似乎更具意义。
