Quantitative analysis of morphological differences on sagittal magnetic resonance imaging between a torn and an intact discoid lateral meniscus in adults

doi:10.3969/j.issn.2095-4344.1013

Abstract

Abstract:

BACKGROUND: Morphological characteristics of the torn discoid lateral meniscus remain unclear, and imaging standards used to evaluate the discoid lateral meniscus tears still need to be explored.

OBJECTIVE: To determine the quantitative differences on sagittal magnetic resonance imaging between a torn discoid lateral meniscus and an intact discoid lateral meniscus in adults.

METHODS: Seventy-two cases of discoid lateral meniscus from July 2010 to July 2016 were enrolled in this study. Thirty?nine patients who underwent arthroscopic surgery for torn discoid lateral meniscus were served as torn group, and additional 33 patients having intact discoid lateral meniscus were as control group. All patients were evaluated for morphological indices of discoid lateral meniscus on sagittal magnetic resonance imaging, including the height of the anterior horn and posterior horn of discoid lateral meniscus, distance between the edges of discoid lateral meniscus and the edges of tibia, and anteroposterior diameter of femur. The relative morphological indices (the ratio of the morphological data of discoid lateral meniscus to the anteroposterior diameter of femur) were also calculated. Then the morphological difference of discoid lateral meniscus between a torn and an intact discoid lateral meniscus was compared. These morphological indices were compared between two groups.

RESULTS AND CONCLUSION: (1) There were no significant differences in the height of the posterior horn of discoid lateral meniscus, distance between posterior edge of discoid lateral meniscus and posterior edge of tibia, and anteroposterior diameter of femur between two groups (P > 0.05). The height of the anterior horn of a torn discoid lateral meniscus (absolute value, relative ratio) was significantly increased compared with the control group (P=0.004, 0.001). The distance between the edge of the anterior horn of discoid lateral meniscus and anterior edge of tibia in the torn group (absolute value, relative ratio) was significantly lower than that in the control group (P=0.001, 0.001). The anteroposterior diameter of a torn discoid lateral meniscus (absolute value, relative ratio) in the torn group was significantly larger than that in the control group (P=0.002, 0.000). (2) There were no significant differences in the morphological indices of sagittal plane between two groups. (3) The interclass correlation coefficient for each parameter indicated a significantly high agreement among two observers (P < 0.001). (4) In summary, the height of the anterior horn and anteroposterior diameter of discoid lateral meniscus, distance between the edge of anterior horn of discoid lateral meniscus and anterior edge of tibia on sagittal magnetic resonance imaging may be useful indicators for evaluating the torn discoid lateral meniscus in adults.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Menisci, Tibial, Magnetic Resonance Imaging, Tissue Engineering

CLC Number:

R445.2

Sun Xiaoxin, Liu Hao, Chai Hongwei, Song Jingfeng, Liang Chunyu. Quantitative analysis of morphological differences on sagittal magnetic resonance imaging between a torn and an intact discoid lateral meniscus in adults [J]. Chinese Journal of Tissue Engineering Research, 2018, 22(35): 5661-5666.

Figures/Tables 2

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