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Congenital central hypoventilation syndrome and carbon dioxide sensitivity.
[hirschsprung disease]
Congenital
central
hypoventilation
syndrome
(
CCHS
)
is
characterised
by
hypoventilation
most
marked
during
sleep
and
is
often
associated
with
abnormalities
of
the
autonomic
nervous
system
.
We
report
an
infant
with
severe
CCHS
and
Hirschsprung
disease
in
whom
,
while
awaiting
genotyping
,
the
diagnosis
was
facilitated
by
the
results
of
a
carbon
dioxide
(
CO
2
)
sensitivity
study
in
the
neonatal
period
and
was
confirmed
by
paired-like
homeobox
2
B
(
PHOX
2
B
)
mutational
analysis
.
The
infant
had
no
ventilatory
response
to
increased
inspired
carbon
dioxide
levels
when
either
awake
or
asleep
suggesting
he
had
a
severe
form
for
CCHS
;
indeed
,
he
subsequently
demonstrated
to
have
the
20
/
31
genotype
.
This
is
the
first
case
report
of
a
genotype-confirmed
CCHS
disease
in
a
neonate
with
Hirschsprung
disease
further
characterised
by
a
ventilatory
challenge
.
Conclusion
:
CO
2
sensitivity
status
may
assist
in
determining
the
severity
of
the
CCHS
.
Diseases
Validation
Diseases presenting
"is often associated with abnormalities of the autonomic nervous system"
symptom
hirschsprung disease
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