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The clinical and pathological features of gastric impaction in twelve horses.
[focal myositis]
Gastric
impaction
in
the
horse
is
poorly
described
in
the
veterinary
literature
.
To
review
the
clinical
and
pathological
features
of
gastric
impaction
.
The
clinical
details
of
horses
presenting
with
colic
over
a
7
-
year
period
and
cases
in
which
gastric
impaction
was
considered
to
determine
the
outcome
were
reviewed
.
Clinical
and
clinicopathological
data
were
recorded
.
Twelve
cases
of
gastric
impaction
were
recorded
(
1
.
4
%
of
857
horses
hospitalised
for
colic
)
.
Diagnosis
was
achieved
by
ultrasonographic
examination
,
gastroscopy
,
exploratory
celiotomy
and
/
or
post
mortem
examination
.
Five
out
of
12
horses
were
successfully
treated
,
5
/
12
were
subjected
to
euthanasia
(
3
at
celiotomy
and
2
due
to
recurrence
of
impaction
)
and
2
/
12
died
.
Three
out
of
12
horses
had
spontaneous
gastric
rupture
despite
attempted
treatment
(
one
was
subjected
to
euthanasia
at
celiotomy
and
2
died
)
.
Post
mortem
examination
(
7
horses
)
revealed
gross
muscular
thickening
of
the
stomach
wall
in
6
/
7
horses
.
Histological
examination
revealed
focal
fibrosis
of
the
stomach
wall
in
4
/
6
and
focal
myositis
in
1
/
6
horses
.
CONCLUSIONS
AND
PRACTICAL
SIGNIFICANCE
:
Gastric
impaction
is
a
rare
cause
of
colic
and
affected
horses
can
present
with
acute
,
chronic
or
recurrent
colic
in
the
presence
or
absence
of
other
gastrointestinal
disease
.
Spontaneous
gastric
rupture
may
occur
.
A
proportion
of
affected
horses
have
gross
thickening
of
the
muscular
layers
of
the
stomach
wall
.