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01.12.2015 | Research article | Ausgabe 1/2015 Open Access

BMC Musculoskeletal Disorders 1/2015

Prevalence of bilateral Discoid Lateral Menisci (DLM) in patients operated for symptomatic DLM with a follow-up study on their asymptomatic contralateral knees: a Magnetic Resonance Imaging (MRI) assessment

Zeitschrift:
BMC Musculoskeletal Disorders > Ausgabe 1/2015
Autoren:
Wen-Xin Liu, Jin-Zhong Zhao, Xiao-Qiao Huangfu, Yao-Hua He, Xing-Guang Yang
Wichtige Hinweise

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

Individual contributions of authors have been specified as follows: WXL, designed the study, acquired data, analyzed results, and revised the manuscript. XQH, interpreted MRI, analyzed results, and revised the manuscript. YHH, participated in planning the study design, statistical analyses, data interpretation, and helped draft the manuscript. XGY, participated in planning the study design, data interpretation, and critically revised the manuscript. JZZ, conceived of the study, and participated in its design and coordination and helped to draft the manuscript. All authors read and approved the final manuscript.

Abstract

Background

The purpose was to investigate prevalence of bilateral discoid lateral menisci (DLM) in Han Chinese patients who received surgery for symptomatic DLM, as well as a follow-up study of their asymptomatic contralateral knees using magnetic resonance imaging (MRI).

Methods

A total of 110 patients [50 males and 60 females; average age: 21.95 ± 12.77 years (range: 6 to 67 years)] admitted to our hospital with symptomatic DLM were treated with arthroscopic surgery. The contralateral asymptomatic knees were evaluated for DLM by MRI. Postoperative clinical evaluation was performed using the Lysholm knee scoring scale and International Knee Documentation Committee subjective knee evaluation.

Results

Eighty (72.73 %) of 110 symptomatic DLM patients had bilateral DLM, of which 68 (85 %) were of homotype (same type). Fourteen of 80 bilateral DLM patients were symptomatic and received operations in both knees. Twelve of remaining 66 bilateral DLM patients with asymptomatic one knee underwent a second arthroscopic surgery as their asymptomatic knees became symptomatic over the five-year interim. Of these 12 cases, seven exhibited no shift and five showed posterocentral meniscal shift. Furthermore, at least two cases showed progression from asymptomatic grade II to symptomatic grade III over the interim. All patients showed significant improvement after surgery.

Conclusions

The bilateral DLM rate of Han Chinese patients with symptomatic DLM was relatively high at 72.7 %, and 85 % of those were of homotype.
Literatur
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