Ahn J H, Shim J S, Hwang C H, Oh W H
Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
J Pediatr Orthop. 2001 Nov-Dec;21(6):812-6.
The authors investigated the correlation between the clinical manifestations and the morphology of discoid lateral meniscus. Thirty-eight children, age 5 to 17 years, with 39 cases of discoid lateral meniscus underwent an arthroscopic procedure and magnetic resonance imaging. The two most frequent preoperative clinical manifestations were pain and extension block. In 19 cases without surface tear, the most frequent clinical manifestation was extension block. In the sagittal magnetic resonance images, the mean thickness of the anterior portion of the discoid lateral meniscus (7.77 mm) in the group with extension block exceeded that (4.02 mm) in the group without extension block. Extension block was significantly more common in patients with the anterior hypertrophy type and the slab (anterior-posterior diffusely hypertrophic) type than in the posterior hypertrophy type by the modified Hall classification. As a result, extension block was significantly correlated with the morphology of the menisci. Also, the thickened anterior portion of the discoid lateral meniscus may be considered one of the mechanical factors that limit knee extension.
作者研究了盘状外侧半月板的临床表现与形态之间的相关性。38名年龄在5至17岁之间的儿童，共39例盘状外侧半月板患者接受了关节镜检查和磁共振成像。术前最常见的两种临床表现是疼痛和伸直受限。在19例无表面撕裂的病例中，最常见的临床表现是伸直受限。在矢状面磁共振图像中，伸直受限组的盘状外侧半月板前部平均厚度（7.77mm）超过无伸直受限组（4.02mm）。根据改良的Hall分类，伸直受限在前肥大型和板状（前后弥漫性肥大）型患者中比后肥大型患者更常见。因此，伸直受限与半月板形态显著相关。此外，盘状外侧半月板前部增厚可被认为是限制膝关节伸直的机械因素之一。
