Talus: Diaphyseal comminuted fractures

More severe trauma can result in comminuted fractures of the talus. The talus can fracture into many configurations. Multifragment fractures may involve the trochlear ridges and/or the body of the talus.
The surrounding soft tissues usually prevent major fragment displacement.

Computed tomography is the imaging technology best suited for a detailed diagnosis, which is a prerequisite for the assessment of treatability and eventually proper screw placement.

Talar fractures can occur after an external trauma or after twisting or shearing of the tarsus. They vary from simple fragmentation of small portions of the trochlear ridges...,

... fractures of the body of the talus...

... to completely disruptive multifragment fractures of the entire body of the talus.

Clinical signs can vary considerably, but very often horses show an acute severe weight bearing lameness (Grade III to V). Significant effusion of the talocrural joint is seen with most fractures of the talus. Fissures can be difficult to find radiographically. Therefore, several projections with different angles including flexed and skyline projections of the tarsus are necessary.
CT imaging is very useful to detect fissure lines and help to understand the configuration of the fracture.