ISAKOS: 2019 Congress in Cancun, Mexico

2019 ISAKOS Biennial Congress ePoster #1002


Preoperative Medial Meniscus Extrusion Rate Is Inversely Correlated with Postoperative Quality of Life in High Tibial Osteotomy Patients

Manabu Akagawa, MD, Akita, Akita JAPAN
Yoshiaki Kimura, MD, Akita, Akita JAPAN
Ikuko Wakabayashi, MD, PhD, Akita, Akita JAPAN
Takeshi Kashiwagura, MD, PhD, Akita, Akita JAPAN
Yoichi Shimada, MD, PhD, Prof., Akita, Akita JAPAN

Akita City Hospital, Akita, Akita, JAPAN

FDA Status Not Applicable


preoperative medial meniscus extrusion rate inversely correlated with postoperative KOOS QOL in patients of high tibial osteotomy.



There are several reports about the poor results of High tibial osoteotomy (HTO) such as obesity and overcorrection, however, there are cases with poor results even though they don’t have these factors. In this study, we focused on the meniscus findings of MRI and investigated factors influencing postoperative results of HTO.


Among patients who underwent HTO between October 2013 and May 2017, we recruited cases who were followed for more than 1 year postoperatively and were able to analyze clinical score. The total subjects were 15 patients involving 16 knees. We evaluated Medial Meniscus Extrusion distance (MMEd), MME ratio (MMEr), and the presence of Medial Meniscus Posterior Root Tear (MMPRT) in preoperative MRI. Further, as clinical score, we evaluated The Knee Injury and Osteoarthritis Outcome Score (KOOS) at the time of final follow up. We analyzed factors affecting postoperative KOOS subscales using multiple regression analysis.


MMPRT was present at 40%, average MMEd was 5.4 mm, average MMEr was 51.7%. As a result of multiple regression analysis, there was significant inverse correlation between MMEr and KOOS QOL.


In this study, MMEr showed a inverse correlation between postoperative KOOS QOL.
Treating MMEr could be the useful option to improve the results of HTO and patients postoperative QOL.