Stark J E, Siegel M J, Weinberger E, Shaw D W
Mallinckrodt Institute of Radiology, St. Louis, MO 63110-1076, USA.
J Comput Assist Tomogr. 1995 Jul-Aug;19(4):608-11. doi: 10.1097/00004728-199507000-00020.
To define the MR appearance of discoid meniscus in children.
In 22 children (15 girls and 7 boys; age range 5-17 years; median age 9 years) who were referred for evaluation of painful knees 27 discoid lateral menisci were identified. Meniscal shape and signal intensity and abnormalities of the surrounding structures were evaluated and compared with adult standards. Clinical (11 knees) or surgical (10 knees) follow-up was available on 16 patients (21 knees).
The menisci were classified as slab type (no. 20) or wedge type (no. 7). Transverse diameter at the midbody was 22.4 mm (range 10.5-36.7 mm) for discoid lateral menisci and 6 mm (range 5.1-28.3 mm) for medial menisci. Of 27 menisci, 23 had a central band of diffusely increased signal. Extension of intrameniscal signal to the joint space was noted in 16 of 23 menisci. Of 9 patients with intrameniscal signal who underwent surgery, only 7 had tears. Associated popliteal cysts occurred in 3 knees. No medial meniscal injury was observed.
The characteristic MRI appearance of symptomatic discoid meniscus in children is that of a diffusely thick meniscus with a slab configuration and diffusely increased intrameniscal signal that may or may not extend to the joint surface.
明确儿童盘状半月板的磁共振成像（MR）表现。
对22例因膝关节疼痛前来评估的儿童（15例女孩，7例男孩；年龄范围5 - 17岁，中位年龄9岁）进行检查，共发现27个外侧盘状半月板。评估半月板的形态、信号强度以及周围结构的异常情况，并与成人标准进行比较。16例患者（21个膝关节）有临床（11个膝关节）或手术（10个膝关节）随访资料。
半月板分为板型（20个）或楔型（7个）。外侧盘状半月板体部中部的横径为22.4 mm（范围10.5 - 36.7 mm），内侧半月板为6 mm（范围5.1 - 28.3 mm）。27个半月板中，23个有中央带信号弥漫性增高。23个半月板中有16个半月板内信号延伸至关节间隙。9例半月板内有信号的患者接受了手术，其中只有7例有撕裂。3个膝关节伴有腘窝囊肿。未观察到内侧半月板损伤。
儿童有症状的盘状半月板的特征性MRI表现为半月板弥漫性增厚，呈板状结构，半月板内信号弥漫性增高，该信号可能延伸至关节面，也可能不延伸。
