副舟骨损伤的MRI诊断价值

Diagnostic Value of MRI in Detection Accessory Navicular Bone Injures

目的:探讨MRI对足副舟骨损伤的诊断价值。材料与方法:分析21例副舟骨损伤的临床和MRI资料。观察副舟骨的分型、骨质信号特点、纤维软骨联合、胫骨后肌腱以及周围软组织情况。结果:本组21例均为Ⅱ型副舟骨。MRI表现:主、副舟骨间的结合区为纤维软骨信号,6例结合区T2WI信号增高。20例主、副舟骨舟骨结合区共同出现骨髓水肿,1例单纯副舟骨出现骨髓水肿,7例结合区旁骨质可见小囊变。发现胫骨后肌腱鞘积液16例,周围非腱性软组织水肿12例。结论:MRI可以良好的反映副舟骨损伤的病理特点,对副舟骨损伤的诊断和治疗治疗方式选择中具有重要意义。

Purpose： To assess the value of magnetcic resonsance imaging （MRI） in the diagnosis of accessory navicular bone injures. Materials and Methods： The clinical and MRI characteristics of 21 cases with clinicals proved accesso- ry navicular bone injures were retrospectively analyized and the type of accessory, signal intensity of bone, fibrocartilaginous junction, posterior tibial tendon, and adjacent soft tisse were evaluated. Results： All 21 cases were type Ⅱ accessory navicualr bone . The signal of synchondroses in the region between the main and accessory navicular was observed , and high intensity signal of T2WI was seen in 6 cases. Marrow edema of the both sides of fibrocartilaginous junction between both navicular was found in 20 cases, and only accessory marrow edema was found in 1 case. Cystic change could be seen near the synchondrosis in 7 cases. Posterior tibial tendon shesth fluid was found in 16 cases. We could also detect adjacent swelling soft tissues in 12 cases. Conclusion： MRI could well reveal the pathology figures of accessory navicular bone injures and play an important role in diagnosis and therapy decision making in navicular bone injures.