Choi Sang Hee, Ahn Jin Hwan, Kim Kang Il, Ji Suk-Kyeong, Kang Su Min, Kim Jung Suk, Lee Sang Hak
Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Knee Surg Sports Traumatol Arthrosc. 2015 Apr;23(4):1128-34. doi: 10.1007/s00167-014-2924-6. Epub 2014 Mar 12.
The aim of this study was to quantitatively compare radiographic findings of symptomatic discoid lateral meniscus in children with those of matched controls.
Seventy-eight consecutive children (91 knees) who underwent arthroscopic surgery for a symptomatic discoid lateral meniscus (discoid group) were included. Another 91 age- and sex-matched controls with normal medial and lateral menisci on the basis of magnetic resonance imaging findings were included in this study (control group). Each plain radiograph was evaluated from the anteroposterior view for the following variables: height of the lateral tibial spine, lateral joint space distance, height of the fibular head, squaring of the lateral femoral condyle, obliquity of the lateral tibial plateau and cupping of the lateral tibial plateau. Lateral femoral condylar notch was evaluated in lateral view. Statistical analyses were used to determine the differences between the two groups.
A significant difference in the mean height of the lateral tibial spine, lateral joint space distance, height of the fibular head, and obliquity of the lateral tibial plateau distinguished the two groups (p < 0.0001). However, there was no statistical difference in the condylar off sign, squaring of the lateral femoral condyle, cupping of the lateral tibial plateau and lateral femoral condylar notch between groups (n.s.). The cut-off values for the height of the lateral tibial spine (6 mm), lateral joint space distance (8 mm), height of the fibular head (14.9 mm) and obliquity of the lateral tibial plateau (17.6°) were determined. With these cut-off values in diagnosing discoid lateral meniscus, the sensitivity and accuracy of height of the fibular head were 78 and 70 %, respectively.
Several plain radiographic findings in symptomatic discoid lateral meniscus in children were significantly different from those in normal control. These findings would be helpful in screening tool of discoid lateral meniscus for children.
II.
本研究旨在对有症状的儿童盘状外侧半月板的影像学表现与匹配对照组进行定量比较。
纳入78例连续接受关节镜手术治疗有症状盘状外侧半月板的儿童（91个膝关节）（盘状组）。本研究还纳入了另外91例根据磁共振成像结果年龄和性别匹配、内外侧半月板正常的对照组（对照组）。对每张X线平片从前位进行如下变量评估：外侧胫骨棘高度、外侧关节间隙距离、腓骨头高度、外侧股骨髁方形化、外侧胫骨平台倾斜度和外侧胫骨平台杯状化。在侧位评估外侧股骨髁切迹。采用统计分析确定两组之间的差异。
外侧胫骨棘平均高度、外侧关节间隙距离、腓骨头高度和外侧胫骨平台倾斜度在两组间存在显著差异（p<0.0001）。然而，两组间髁突偏移征、外侧股骨髁方形化、外侧胫骨平台杯状化和外侧股骨髁切迹无统计学差异（无显著性）。确定了外侧胫骨棘高度（6mm）、外侧关节间隙距离（8mm）、腓骨头高度（14.9mm）和外侧胫骨平台倾斜度（17.6°）的截断值。利用这些截断值诊断盘状外侧半月板，腓骨头高度的敏感性和准确性分别为78%和70%。
有症状的儿童盘状外侧半月板的一些X线平片表现与正常对照组有显著差异。这些发现将有助于儿童盘状外侧半月板的筛查。
II级。
