Journal article
Sex Difference in Contusion of the Medial Femoral Condyle Rim-Association with MRI Occult Meniscal Tears in the ACL Deficient Knee
The Iowa orthopaedic journal, Vol.40(2), pp.30-36
2020
PMCID: PMC7894061
PMID: 33633505
Appears in Diamond Open Access
Abstract
Meniscal tears, specifically lateral meniscal tears, have a larger than expected un-derdiagnosis rate in the presence of an ACL tear. The purpose of our study was to search for an MRI bone contusion pattern associated with MRI occult meniscal tears in patients with an ACL tear, specifically a contusion of the rim of the medial femoral condyle (RMFC). Our hypothesis was that there would be a significant association between RMFC contusions and MRI occult meniscal tears in patients with an ACL tear. We also searched for a difference between sexes with respect to the presence of the RMFC contusion in the setting of an occult meniscal tear. We also categorized the type, size, and location of these occult meniscal tears in the setting of an ACL tear.
This was a retrospective study that examined characteristics of occult meniscal tears and their association with a RMFC bone contusion. IRB approval was obtained. The date range of the study was June 2009 through December 2015. 6392 consecutive knee MRI reports in patients with an ACL deficient knee were reviewed. The study group included 22 patients with MRI occult meniscal tears, the control group included 110 patients. Relevant statistical values were calculated.
The most common type of occult meniscal tears were small radial and small longitudinal tears of the lateral meniscus. Occult meniscal tears were associated with an RMFC contusion in the study group (p=0.0457), particularly in males (p = 0.0003). In males with a torn ACL, the sensitivity of an RMFC contusion for an occult meniscal tear was 80%.
In males with an ACL tear, there was a significant association between a contusion of the RMFC and an occult meniscal tear (commonly small radial or small peripheral partial-thickness longitudinal tears). RMFC contusions were reliably identified by radiologists in this study.
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Details
- Title: Subtitle
- Sex Difference in Contusion of the Medial Femoral Condyle Rim-Association with MRI Occult Meniscal Tears in the ACL Deficient Knee
- Creators
- Nicholas P Fleege - Department of Student Affairs, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa, USAD Lee Bennett - University of IowaHoward J O'Rourke - University of IowaKenjirou Ohashi - University of Iowa
- Resource Type
- Journal article
- Publication Details
- The Iowa orthopaedic journal, Vol.40(2), pp.30-36
- Publisher
- Dept. of Orthopaedics, The University of Iowa; United States
- PMID
- 33633505
- PMCID
- PMC7894061
- ISSN
- 1541-5457
- eISSN
- 1555-1377
- Language
- English
- Date published
- 2020
- Academic Unit
- Radiology
- Record Identifier
- 9984318797802771
Metrics
3 Record Views