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Sciatica caused by pyomyositis of the piriformis muscle in a pediatric patient.
[pyomyositis]
Because
the
sciatic
nerve
leaves
the
pelvis
through
the
greater
sciatic
notch
underneath
the
piriformis
muscle
,
any
pathology
of
the
piriformis
muscle
could
result
in
entrapment
of
the
sciatic
nerve
;
this
is
widely
known
as
piriformis
muscle
syndrome
.
Pyomyositis
of
the
piriformis
muscle
may
be
a
cause
of
piriformis
muscle
syndrome
.
Piriformis
muscle
syndrome
caused
by
pyomyositis
of
the
piriformis
muscle
in
pediatric
patients
is
rare
.
This
article
describes
a
case
of
sciatica
caused
by
pyomyositis
of
the
piriformis
muscle
in
a
pediatric
patient
.
A
6
-
year
-old
boy
presented
with
right
buttock
and
thigh
pain
following
a
mild
fever
and
sore
throat
.
The
pain
worsened
,
and
he
became
unable
to
walk
.
On
admission
,
his
temperature
was
38
.
4
°
C
.
He
reported
severe
right
-sided
buttock
and
lateral
thigh
pain
.
Positive
Freiberg
sign
was
observed
.
Laboratory
examination
revealed
elevated
white
blood
cell
count
and
C-
reactive
protein
level
.
T
2
-
weighted
magnetic
resonance
images
of
the
pelvis
revealed
high
-intensity
changes
of
the
piriformis
muscle
and
iliosacral
joint
.
Thus
,
piriformis
syndrome
caused
by
pyomyositis
of
the
piriformis
muscle
was
diagnosed
.
Oral
antibiotics
(
10
mg
/
kg
per
day
of
cefdinir
)
were
administered
.
Pain
gradually
decreased
,
and
the
patient
was
able
to
walk
.
Final
follow-up
examination
at
6
months
after
symptom
onset
revealed
no
sciatic
pain
.
Follow-up
magnetic
resonance
imaging
revealed
normalized
intensities
of
the
piriformis
muscle
.
The
endopelvic
fascia
provides
a
route
for
infection
from
the
pelvis
to
the
piriformis
.
The
pyomyositis
of
the
piriformis
muscle
in
the
current
case
may
have
occurred
secondary
to
the
pyoarthritis
of
the
sacroiliac
joint
.
Endopelvic
infections
involving
the
piriformis
muscle
may
mimic
hip
diseases
in
pediatric
patients
.
Diseases
Validation
Diseases presenting
"pain"
symptom
achondroplasia
acute rheumatic fever
adrenal incidentaloma
adrenomyeloneuropathy
aniridia
aromatase deficiency
carcinoma of the gallbladder
cholangiocarcinoma
coats disease
congenital diaphragmatic hernia
congenital toxoplasmosis
cushing syndrome
cutaneous mastocytosis
cystinuria
dedifferentiated liposarcoma
dentin dysplasia
dracunculiasis
dystrophic epidermolysis bullosa
epidermolysis bullosa simplex
erdheim-chester disease
erythropoietic protoporphyria
esophageal adenocarcinoma
esophageal carcinoma
esophageal squamous cell carcinoma
fabry disease
familial mediterranean fever
focal myositis
hirschsprung disease
hodgkin lymphoma, classical
holt-oram syndrome
junctional epidermolysis bullosa
kabuki syndrome
kindler syndrome
lamellar ichthyosis
liposarcoma
locked-in syndrome
lymphangioleiomyomatosis
malignant atrophic papulosis
neuralgic amyotrophy
oligodontia
oral submucous fibrosis
papillon-lefèvre syndrome
phenylketonuria
pleomorphic liposarcoma
primary hyperoxaluria type 1
proteus syndrome
pyomyositis
scrub typhus
sneddon syndrome
systemic capillary leak syndrome
thoracic outlet syndrome
trochlear dysplasia
typhoid
von hippel-lindau disease
waldenström macroglobulinemia
well-differentiated liposarcoma
wolf-hirschhorn syndrome
This symptom has already been validated