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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
"skeletal muscle"
symptom
cadasil
epidermolysis bullosa simplex
esophageal adenocarcinoma
focal myositis
hereditary cerebral hemorrhage with amyloidosis
inclusion body myositis
lamellar ichthyosis
neuralgic amyotrophy
pleomorphic liposarcoma
pyomyositis
pyruvate dehydrogenase deficiency
systemic capillary leak syndrome
well-differentiated liposarcoma
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