Page 350 - Equine Clinical Medicine, Surgery and Reproduction, 2nd Edition

Musculoskeletal system: 1.8 Soft-tissue injuries 325

VetBooks.ir Ultrasonography diffuse hypoechogenic (Figs. 1.626–1.630). Diffuse
lesions are common. In chronic cases there are often
The lesions are similar to those encountered in the
SDFT, with an increased CSA on transverse scans
facts, compatible with focal mineralisation, which
and lesions ranging from discrete anechogenic to hyperechogenic areas casting acoustic shadow arte-

1.626 1.627

Fig. 1.626 Well-defined,
hypoechogenic lesion in the
medial part of the SL body (arrow).
The ligament is only moderately
increased in size around the lesion.

Fig. 1.627 Severe tear in a
hindlimb SL body (double arrow)
with a severe increase in cross-
sectional surface area displacing
the DDFT and tibial collateral
ligament, and diffusely mottled
hypoechogenicity.

1.628 1.629

Fig. 1.628 Longitudinal (sagittal) sonogram from a Fig. 1.629 Chronic, diffuse desmopathy of the
plantar approach in the same horse as in 1.627, showing SL body, characterised by an increased cross-
complete loss of fibre alignment and heterogeneous sectional surface area and a diffuse heterogeneous
loss of echogenicity. The enlarged SL fills up the entire decrease in echogenicity (yellow arrows). Note the
space between the third metatarsal bone (Mt3) and periligamentous thickening (red arrow).
the DDFT (double red arrow).