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MEFV gene polymorphisms and TNFRSF1A mutation in patients with inflammatory myopathy with abundant macrophages.
[familial mediterranean fever]
Inflammatory
myopathy
with
abundant
macrophages
(
IMAM
)
has
recently
been
proposed
as
a
new
clinical
condition
.
Although
IMAM
shares
certain
similarities
with
other
inflammatory
myopathies
,
the
mechanisms
responsible
for
this
condition
remain
unknown
.
Patients
with
familial
Mediterranean
fever
(
FMF
)
and
tumour
necrosis
factor
receptor-associated
periodic
syndrome
(
TRAPS
)
also
often
develop
myalgia
.
We
therefore
investigated
the
polymorphisms
or
mutations
of
MEFV
and
TNFRSF
1
A
genes
in
patients
with
IMAM
to
identify
their
potential
role
in
this
condition
.
We
analysed
the
clinical
features
of
nine
patients
with
IMAM
and
sequenced
exons
of
the
MEFV
and
TNFRSF
1
A
genes
.
The
patients
with
IMAM
had
clinical
symptoms
such
as
myalgia
,
muscle
weakness
,
erythema
,
fever
and
arthralgia
.
Although
none
of
the
patients
were
diagnosed
with
FMF
or
TRAPS
,
seven
demonstrated
MEFV
polymorphisms
(
G
304
R
,
R
202
R
,
E
148
Q
,
E
148
Q-L
110
P
and
P
369
S-R
408
Q
)
,
and
one
demonstrated
a
TNFRSF
1
A
mutation
(
C
43
R
)
.
These
results
suggest
that
MEFV
gene
polymorphisms
and
TNFRSF
1
A
mutation
are
susceptibility
and
modifier
genes
in
IMAM
.
Diseases
Validation
Diseases presenting
"fever"
symptom
22q11.2 deletion syndrome
acute rheumatic fever
alexander disease
allergic bronchopulmonary aspergillosis
canavan disease
carcinoma of the gallbladder
child syndrome
congenital toxoplasmosis
cushing syndrome
cystinuria
dracunculiasis
erdheim-chester disease
esophageal adenocarcinoma
esophageal carcinoma
familial mediterranean fever
focal myositis
hodgkin lymphoma, classical
lamellar ichthyosis
legionellosis
locked-in syndrome
malignant atrophic papulosis
neonatal adrenoleukodystrophy
neuralgic amyotrophy
oculocutaneous albinism
papillon-lefèvre syndrome
pyomyositis
pyruvate dehydrogenase deficiency
scrub typhus
severe combined immunodeficiency
sneddon syndrome
systemic capillary leak syndrome
triple a syndrome
typhoid
waldenström macroglobulinemia
wolf-hirschhorn syndrome
This symptom has already been validated