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Clinical, Electrophysiological Findings in Adult Patients with Non-traumatic Plexopathies.
[neuralgic amyotrophy]
To
ascertain
the
etiology
of
non-traumatic
plexopathy
and
clarify
the
clinical
,
electrophysiological
characteristics
according
to
its
etiology
.
We
performed
a
retrospective
analysis
of
63
non-traumatic
plexopathy
patients
that
had
been
diagnosed
by
nerve
conduction
studies
(
NCS
)
and
needle
electromyography
(
EMG
)
.
Clinical
,
electrophysiological
,
imaging
findings
were
obtained
from
medical
records
.
We
identified
36
cases
with
brachial
plexopathy
(
BP
)
and
27
cases
with
lumbosacral
plexopathy
(
LSP
)
.
The
causes
of
plexopathy
were
neoplastic
(
36
.
1
%
)
,
thoracic
outlet
syndrome
(
TOS
)
(
25
.
0
%
)
,
radiation
induced
(
16
.
7
%
)
,
neuralgic
amyotrophy
(
8
.
3
%
)
,
perioperative
(
5
.
6
%
)
,
unknown
(
8
.
3
%
)
in
BP
,
while
neoplastic
(
59
.
3
%
)
,
radiation
induced
(
22
.
2
%
)
,
neuralgic
amyotrophy
(
7
.
4
%
)
,
psoas
muscle
abscess
(
3
.
7
%
)
,
and
unknown
(
7
.
4
%
)
in
LSP
.
In
neoplastic
plexopathy
,
pain
presented
as
the
first
symptom
in
most
patients
(
82
.
8
%
)
,
with
the
lower
trunk
of
the
brachial
plexus
predominantly
involved
.
In
radiation
induced
plexopathy
(
RIP
)
,
pain
was
a
common
initial
symptom
,
but
the
proportion
was
smaller
(
50
%
)
,
and
predominant
involvements
of
bilateral
lumbosacral
plexus
and
whole
trunk
of
brachial
or
lumbosacral
plexus
were
characteristic
.
Myokymic
discharges
were
noted
in
41
.
7
%
patients
with
RIP
.
Abnormal
NCS
finding
in
the
medial
antebrachial
cutaneous
nerve
was
the
most
sensitive
to
diagnose
TOS
.
Neuralgic
amyotrophy
of
the
brachial
plexus
showed
upper
trunk
involvement
in
all
cases
.
By
integrating
anatomic
,
pathophysiologic
knowledge
with
detailed
clinical
assessment
and
the
results
of
ancillary
studies
,
physicians
can
make
an
accurate
diagnosis
and
prognosis
.
Diseases
Validation
Diseases presenting
"upper trunk involvement in all cases"
symptom
neuralgic amyotrophy
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