Mosel Leigh D, Kat Evelyn, Voyvodic Frank
Department of Radiology, Flinders Medical Centre, South Australia, Australia.
Australas Radiol. 2004 Jun;48(2):267-71. doi: 10.1111/j.1440-1673.2004.01286.x.
Accessory ossicles of the foot are commonly mistaken for fractures. The accessory navicular is one of the most common accessory ossicles of the foot. There is a higher incidence in women and the finding might be bilateral in 50-90%. This entity is usually asymptomatic, although populations with medial foot pain have a higher prevalence. Three types of accessory navicular bone have been described. The type II accessory navicular is the most commonly symptomatic variant with localized chronic or acute on chronic medial foot pain and tenderness with associated inflammation of overlying soft tissues. Plain radiographic identification of the accessory navicular is insufficient to attribute symptomatology. Ultrasound allows for comparison with the asymptomatic side and localization of pain. Bone scintigraphy has a high sensitivity but positive findings lack specificity. Magnetic resonance imaging is of high diagnostic value for demonstrating both bone marrow and soft tissue oedema.
足部副骨常被误诊为骨折。副舟骨是足部最常见的副骨之一。女性发病率较高，50% - 90%的病例可能为双侧。该病变通常无症状，不过足内侧疼痛人群的患病率更高。已描述了三种类型的副舟骨。II型副舟骨是最常见的有症状变异型，表现为局限性慢性或慢性基础上的急性足内侧疼痛和压痛，并伴有覆盖软组织的炎症。通过普通X线片识别副舟骨不足以确定症状。超声可用于与无症状侧进行比较并定位疼痛部位。骨闪烁显像具有高敏感性，但阳性结果缺乏特异性。磁共振成像对于显示骨髓和软组织水肿具有很高的诊断价值。
