Rare Diseases Symptoms Automatic Extraction
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[Autoantibody profile in myositis].
[inclusion body myositis]
Patients
suffering
from
muscular
symptoms
or
with
an
increase
of
creatine
kinase
levels
may
present
a
myopathy
.
In
such
situations
,
clinicians
have
to
confirm
the
existence
of
a
myopathy
and
determine
if
it
is
an
acquired
or
a
genetic
muscular
disease
.
In
the
presence
of
an
acquired
myopathy
after
having
ruled
out
an
infectious
,
a
toxic
agent
or
an
endocrine
cause
,
physicians
must
identify
which
type
of
idiopathic
myopathy
the
patient
is
presenting
:
either
a
myositis
including
polymyositis
,
dermatomyositis
,
and
inclusion
body
myositis
,
or
an
immune-mediated
necrotizing
myopathy
.
Histopathology
examination
of
a
muscle
biopsy
is
determinant
but
detection
of
autoantibody
is
now
also
crucial
.
The
myositis
-
specific
antibodies
and
myositis
-associated
antibodies
lead
to
a
serologic
approach
complementary
to
the
histological
classification
,
because
strong
associations
of
myositis
-
specific
antibodies
with
clinical
features
and
survival
have
been
documented
.
The
presence
of
anti-synthetase
antibodies
is
associated
with
an
original
histopathologic
pattern
between
polymyositis
and
dermatomyositis
,
and
defines
a
syndrome
where
interstitial
lung
disease
drives
the
prognosis
.
Anti-
MDA-
5
antibody
are
specifically
associated
with
dermatomyositis
,
and
define
a
skin
-
lung
syndrome
with
a
frequent
severe
disease
course
.
Anti-
TIF
1
-
γ
is
also
associated
with
dermatomyositis
but
its
presence
is
frequently
predictive
of
a
cancer
association
whereas
anti-
MI
2
is
associated
with
the
classical
dermatomyositis
.
Two
specific
antibodies
,
anti-
SRP
and
anti-
HMGCR
,
are
observed
in
patients
with
immune-mediated
necrotizing
myopathies
and
may
be
very
useful
to
distinguish
acquired
myopathies
from
dystrophic
muscular
diseases
in
case
of
a
slow
onset
and
to
allow
the
initiation
of
effective
therapy
.
Diseases
Validation
Diseases presenting
"myopathy"
symptom
coats disease
cushing syndrome
dystrophic epidermolysis bullosa
epidermolysis bullosa simplex
familial mediterranean fever
focal myositis
homocystinuria without methylmalonic aciduria
inclusion body myositis
junctional epidermolysis bullosa
lymphangioleiomyomatosis
megacystis-microcolon-intestinal hypoperistalsis syndrome
pyruvate dehydrogenase deficiency
This symptom has already been validated