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Primary hyperparathyroidism in children and adolescents.
[familial hypocalciuric hypercalcemia]
Primary
hyperparathyroidism
(
PHPT
)
is
a
common
endocrine
disorder
in
adults
in
whom
the
typical
presentation
is
incidentally
discovered
as
asymptomatic
hypercalcemia
.
PHPT
is
much
less
common
in
children
and
adolescents
,
but
has
greater
morbidity
in
this
age
group
,
as
most
young
patients
with
PHPT
will
have
symptomatic
hypercalcemia
or
complications
such
as
kidney
stones
,
abdominal
pain
,
and
skeletal
fragility
.
An
important
feature
of
PHPT
in
younger
patients
is
the
relatively
high
prevalence
of
germline
inactivating
mutations
of
the
CASR
gene
,
which
encodes
the
calcium-sensing
receptor
.
Biallelic
CASR
mutations
cause
neonatal
severe
hyperparathyroidism
,
a
life-threatening
condition
that
presents
within
days
of
life
with
marked
hypercalcemia
,
respiratory
distress
,
failure
to
thrive
,
and
skeletal
demineralization
.
By
contrast
,
more
common
heterozygous
CASR
mutations
are
generally
associated
with
a
benign
variant
of
PHPT
termed
familial
hypocalciuric
hypercalcemia
.
Appropriate
management
of
PHPT
in
children
and
adolescents
requires
distinction
between
familial
hypocalciuric
hypercalcemia
,
which
generally
requires
no
specific
treatment
,
and
other
forms
of
PHPT
that
are
best
treated
by
parathyroidectomy
.
Diseases
Validation
Diseases presenting
"which generally requires no specific treatment"
symptom
familial hypocalciuric hypercalcemia
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