sually non-infective in character.

The _cul-de-sac_ of the capsular ligament of the fetlock joint which
extends upward between the bifurcation of the suspensory ligament is the
most frequently affected structure in this region. When distended, two
spheroidal masses bulge laterally and anterior to the flexor tendons in
a characteristic manner. This condition is known among horsemen as
"wind-gall" or "fetlock-gall."

The sheath of the flexor tendons, which begins about the middle portion
of the lower third of the metacarpus, and continues downward below the
pastern joint is often distended.

Excepting in cases of acute inflammation attending synovitis of these
parts, no lameness marks its existence and in chronic cases of synovial
distension the service of affected animals is not interfered with. These
distensions constitute unsightly blemishes and they are treated chiefly
for this reason.

No difficulty is encountered in recognizing these conditions even where
considerable organization of tissue overlying distended thecae occurs.
In such cases there may be only slight fluctuation of the enlargement,
but if necessary, an aseptic exploratory puncture may be made with a
suitable needle or trocar.

Treatment.--Complete rest and the local application of cold packs are
in order in acute synovitis when there is distension of tendon sheaths.
In the fetlock region, because of the ease with which pressure may be
employed, the parts should be kept snugly wrapped with cotton, and derby
bandages are used to exert the desired amount of pressure over the
affected region. The pressure-bandages should be employed as soon as all
acute and painful inflammation has subsided; and then they should be
continued, day and night, for ten days or two weeks. The bandages should
be removed morning and night. After the skin of the leg has thoroughly
dried off, an infriction of alcohol or distilled extract of hamamelis is
given the parts and the cotton and bandages are readjusted. A good, even
and firm pressure in such cases is productive of satisfactory results.

[Illustration: Fig. 29--Distension of theca of the extensor of the digit
(extensor pedis).]

In chronic distensions of tendon sheaths synovia may be aspirated and
about five cubic centimeters of equal parts of tincture of iodin and
alcohol is injected into the cavity. This is not done, however, without
usual aseptic precautions. If no marked swelling results within
forty-eight hours