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Autosomal recessive cystinuria caused by genome-wide paternal uniparental isodisomy in a patient with Beckwith-Wiedemann syndrome.
[cystinuria]
Approximately
20
%
of
Beckwith-
Wiedemann
syndrome
(
BWS
)
cases
are
caused
by
mosaic
paternal
uniparental
disomy
of
chromosome
1
1
(
pUPD
11
)
.
Although
pUPD
11
is
usually
limited
to
the
short
arm
of
chromosome
11
,
a
small
minority
of
BWS
cases
show
genome-
wide
mosaic
pUPD
(
GWpUPD
)
.
These
patients
show
variable
clinical
features
depending
on
mosaic
ratio
,
imprinting
status
of
other
chromosomes
,
and
paternally
inherited
recessive
mutations
.
To
date
,
there
have
been
no
reports
of
a
mosaic
GWpUPD
patient
with
an
autosomal
recessive
disease
caused
by
a
paternally
inherited
recessive
mutation
.
Here
,
we
describe
a
patient
concurrently
showing
the
clinical
features
of
BWS
and
autosomal
recessive
cystinuria
.
Genetic
analyses
revealed
that
the
patient
has
mosaic
GWpUPD
and
an
inherited
paternal
homozygous
mutation
in
SLC
7
A
9
.
This
is
the
first
report
indicating
that
a
paternally
inherited
recessive
mutation
can
cause
an
autosomal
recessive
disease
in
cases
of
GWpUPD
mosaicism
.
Investigation
into
recessive
mutations
and
the
dysregulation
of
imprinting
domains
is
critical
in
understanding
precise
clinical
conditions
of
patients
with
mosaic
GWpUPD
.
Diseases
Validation
Diseases presenting
"that a paternally inherited recessive mutation can cause an autosomal recessive disease in cases of gwpupd mosaicism"
symptom
cystinuria
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