[膝关节MRI]儿童前交叉韧带撕裂的MR诊断基础（可编辑）

[膝关节MRI]儿童前交叉韧带撕裂的MR诊断基础（可编辑） [膝关节MRI]儿童前交叉韧带撕裂的MR诊断基础 Pediatric Imaging Kwanseop Lee MD Anterior Cruciate Ligament Marilyn J Siegel MD Debra M Lau MD Tears MR Imaging–based Charles F Hildebolt PhD DDS Matthew J Matava MD Diagnosis in a Pediatric Index terms Population1 Knee injuries 4524191 45242 4524852 4524857 Knee ligaments menisci and PURPOSE To evaluate the diagnostic accuracy of primary and secondary magnetic cartilage 4524191 45242 resonance MR imaging findings of anterior cruciate ligament ACL tears in young 4524852 4524857 Knee MR 452121411 452121412 patients with immature skeletal systems 452121416 MATERIALS AND METHODS MR images obtained in 43 patients aged 5–16 years Radiology 1999 213697–704 who underwent arthroscopy were retrospectively reviewed Two reviewers evaluated primary findings abnormal signal intensity abnormal course as defined by Blumen- Abbreviation saat angle and discontinuity secondary findings bone bruise in lateral compart- ACL anterior cruciate ligament ment anterior tibial displacement uncovering of posterior horn of lateral meniscus posterior cruciate ligament line and posterior cruciate angle and meniscal and 1 From the Department of Radiology other ligamentous injuries Hallym University School of Medicine Seoul Korea KL the Mallinckrodt RESULTS There were 19 ACL tears and 24 intact ACLs Overall sensitivity and Institute of Radiology 510 S Kingshigh- specificity of MR imaging in detecting ACL tears were 95 and 88 respectively way Blvd St Louis MO 63110 com com the Department of Radiology Sensitivities of the primary findings were 94 for abnormal Blumensaat angle 79 Stanford University School of Medi- abnormal signal intensity and 21 discontinuity The specificity of all primary cine Palo Alto Calif com and the findings was 88 or greater The sensitivity and specificity of the secondary findings Department of Orthopaedic Surgery Washington University School of Medi- respectively were 68 and 88 for bone bruise 63 and 92 anterior tibial cine St Louis com Received Sep- displacement 42 and 96 uncovered posterior horn of lateral meniscus 68 tember 10 1998 revision requested and 92 positive posterior cruciate line and 74 and 71 abnormal posterior November 3 final revision received March 17 1999 accepted April 26 cruciate angle Fifteen 79 patients had meniscal tears and five 26 had Address reprint requests to com collateral ligament injuries e-mail siegelmcom CONCLUSION Primary and secondary findings of ACL tears in young patients have RSNA 1999 high specificity and are useful for diagnosis Magnetic resonance MR imaging has been established as a highly useful method of accurately evaluating the anterior cruciate ligament ACL in adult patients 1–4 Although MR imaging of knee injuries in pediatric populations has been evaluated in some series 56 to the best of our knowledge no large studies have involved the assessment of the