Page 384 - Equine Clinical Medicine, Surgery and Reproduction, 2nd Edition

Musculoskeletal system: 1.8 Soft-tissue injuries 359

VetBooks.ir 1.709 1.710

Fig. 1.709 Transverse sonogram over the distal
metacarpus of a horse with idiopathic distension of
the digital tendon sheath. The sheath is distended Fig. 1.710 Subacute traumatic tenosynovitis.
by anechogenic fluid. The flexor tendons are well The vincula are thickened (arrow) and there is a
delineated, but no thickened synovial membrane is halo of hypoechogenic tissue around the tendons
visible. The proximal vincula of the DDFT are visible (arrowheads). The sheath is distended by anechogenic
within the proximal recesses of the sheath (arrow). fluid.

1.711 1.712

Figs. 1.711, 1712 Chronic traumatic tenosynovitis. There is a halo of echogenic synovial tissue around the
tendons, separating the DDFT from the SDFT and its manica flexoria (arrows) (1.711). In extreme cases (1.712),
thickened synovium can totally obliterate the sheath (arrows), enclosing the tendons and vincula in solid tissue
and thus causing restriction of movement in the affected part of the limb.