Page 328 - Equine Clinical Medicine, Surgery and Reproduction, 2nd Edition

Musculoskeletal system: 1.8 Soft-tissue injuries 303

VetBooks.ir 1.578 1.579

Fig. 1.578 Complete rupture of the lateral
insertional branch of the SDFT (transverse
ultrasonographic scan at the level of the distal P1 Fig. 1.579 Dorsomedial/palmarolateral radiograph
obtained from a palmarolateral approach). The SDFT of the digit of a horse with avulsion of both
branch is very enlarged, hypoechogenic with complete branches of the SDFT. Two bony fragments, avulsed
loss of structure and ill-defined contours (demarcated from the P2 palmar processes (arrowhead), are
by arrows). AL = proximal digital annular ligament. displaced proximally (red arrows). Subluxation and
hyperextension of the proximal interphalangeal joint
is obvious dorsally (yellow arrow).

1.580 1.581

Figs. 1.580, 1.581 Transverse ultrasound scans obtained from the same horse 3 days (1.580) and 16 days
after injury (1.581). In 1.580, the lesion is ill defined, heterogeneous and echogenic. In 1.581, the lesion now
appears hypoechogenic and better defined and has moderately enlarged.