ANTERIOR TRANSLOCATION OF THE TIBIA AT MR-IMAGING - A SECONDARY SIGN OF ANTERIOR CRUCIATE LIGAMENT TEAR

Citation
Tn. Vahey et al., ANTERIOR TRANSLOCATION OF THE TIBIA AT MR-IMAGING - A SECONDARY SIGN OF ANTERIOR CRUCIATE LIGAMENT TEAR, Radiology, 187(3), 1993, pp. 817-819
Citations number
6
Categorie Soggetti
Radiology,Nuclear Medicine & Medical Imaging
Journal title
ISSN journal
00338419
Volume
187
Issue
3
Year of publication
1993
Pages
817 - 819
Database
ISI
SICI code
0033-8419(1993)187:3<817:ATOTTA>2.0.ZU;2-F
Abstract
The authors evaluated measurement of the degree of anterior subluxatio n (''translocation'') of the tibia in regard to the femur as a predict or of anterior cruciate ligament (ACL) tear. Eighty-nine magnetic reso nance (MR) imaging studies of patients with either an arthroscopically confirmed intact (n = 29), acutely tom (n = 27), or chronically tom ( n = 33) ACL were retrospectively reviewed. The degree of translocation was measured on hard-copy images by using two methods. Buckling of th e posterior cruciate ligament (PCL) was also evaluated. Anterior tibia l translocation, when measured at the midsagittal plane of the lateral femoral condyle with regard to a plane parallel to the cephalocaudal axis of the image, was a relatively specific indicator of ACL disrupti on. Subluxation of 5 mm or more had 58% sensitivity, 93% specificity, and 69% accuracy for an ACL tear. All knees with subluxation of 7 mm o r more had torn ACLs. Buckling of the PCL was less sensitive and less accurate than anterior translocation as an indicator of ACL disruption .