MR Imaging Diagnosis of Posterior Cruciate Ligament Injury: Importance of Ancillary Findings.
10.3348/jkrs.1997.36.4.697
- Author:
Kang Ik HWANG
1
;
Jong Hwa LEE
;
Young Sun KIM
;
Jung Hwoi LEE
;
Tae Sung KI
;
Jong Oag PARK
Author Information
1. Department of Radiology, Ulsan University Hospital.
- Publication Type:Original Article
- Keywords:
Knee, inuries;
Knee, MR;
Ligaments, injuries
- MeSH:
Anterior Cruciate Ligament;
Diagnosis*;
Humans;
Incidence;
Ligaments;
Magnetic Resonance Imaging*;
Posterior Cruciate Ligament*;
Retrospective Studies;
Rupture;
Sensitivity and Specificity
- From:Journal of the Korean Radiological Society
1997;36(4):697-701
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate the importance of two ancillary findings of anterior tibial plateau bruise/fracture and popliteus muscle strain on MR diagnosis of posterior cruicate ligament injury. MATERIALS AND METHODS: We retrospectively evaluated 48 patients with confirmed posterior cruciate ligament tear. We studied the incidence of anterior tibial plateau injury and popliteus muscle strain, and the specificity of popliteus muscle strain with or without bony injury. RESULTS: A complete tear of the posterior cruciate ligament was noted in 37 cases, a partial tear in 11. Anterior tibial plateau lesion was found in 21 of 48 cases (44%); This total was made up of 17/37 PCL complete tears (46%) and 4/11 partial tears (36%). The difference in the incidence of complete and partial tears is not statisticially significant. Popliteus muscle injury was found in 20 of 48 cases (42%), the total consisted of 19/37 PCL complete tears (51%) and 1/11 partial tears (10%). The incidence of 42% is relatively high, approximating that of bony injury. The difference in the incidence of complete and partial tears is statistically significant (p<0.006). Specificity for posterior cruciate ligament tear is 69% (20/29), and when concomitant with anterior tibial plateua injury is 94% (16/17). CONCLUSION: As in the case of anterior cruciate ligament injury, these documented ancillary findings of anterior tibial plateau and popliteus muscle injuries are very helpful when MR diagnosis of posterior cruciate ligament injury itself and differentiation of partial and complete rupture are doubtful.
