Crim Julia
Department of Radiology, University of Utah School of Medicine, 30 North 1900 East #1A71, Salt Lake City, UT 84132-2140, USA.
Radiol Clin North Am. 2008 Nov;46(6):1017-26, vi. doi: 10.1016/j.rcl.2008.09.005.
A coalition is a congenital bony, cartilaginous, or fibrous connection (called a bar) between two or more bones. Coalitions are clinically significant because they prevent normal joint motion. Tarsal coalition may be difficult to identify on clinical and imaging evaluation. Given the high prevalence of coalition, radiologists must be alert to the often subtle imaging findings.
联合是两块或多块骨头之间先天性的骨、软骨或纤维连接（称为骨桥）。联合具有临床意义，因为它们会阻碍正常的关节活动。跗骨联合在临床和影像学评估中可能难以识别。鉴于联合的高发生率，放射科医生必须警惕那些常常很细微的影像学表现。
