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[A case of pseudophlebitis of the great saphenous vein: focal nodular myositis of the gracilis muscle].
[focal myositis]
A
case
of
focal
myositis
in
a
healthy
68
-
year
-old
woman
is
described
.
The
patient
was
admitted
for
evaluation
of
a
painful
soft
-tissue
mass
localised
on
the
medial
side
of
the
left
thigh
,
initially
misdiagnosed
as
thrombophlebitis
of
the
v
.
saphena
magna
.
Laboratory
data
were
normal
,
in
particular
sedimentation
rate
and
muscle
enzyme
levels
.
After
exclusion
of
venous
thrombosis
,
the
mass
localised
in
the
left
m
.
gracilis
was
surgically
removed
.
Histologic
examination
of
the
biopsy
specimen
showed
muscle
cell
necrosis
and
severe
inflammation
,
with
lymphocytic
infiltration
leading
to
the
diagnosis
of
focal
myositis
.
This
is
a
rare
benign
inflammatory
pseudotumour
of
skeletal
muscle
.
The
aetiology
and
pathogenesis
of
the
disease
remain
unclear
.
It
is
most
commonly
seen
in
the
lower
extremities
and
may
mimic
thrombophlebitis
or
soft
-tissue
neoplasm
.
Ultrasound
and
magnetic-resonance
scans
are
helpful
,
but
definitive
diagnosis
is
obtained
only
by
histology
.
Because
recurrent
lesions
in
other
skeletal
muscles
are
possible
,
and
a
third
of
patients
develop
polymyositis
,
a
follow-up
of
several
years
is
recommended
.
Diseases
Validation
Diseases presenting
"soft-tissue neoplasm"
symptom
focal myositis
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