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Venous lesions as a cause of sylvian aqueductal obstruction: case report.
[hydrocephalus with stenosis of the aqueduct of sylvius]
The
cases
of
two
patients
who
presented
with
sylvian
aqueductal
obstruction
caused
by
venous
lesions
(
an
ectatic
vein
and
a
developmental
venous
anomaly
,
which
are
uncommon
causes
of
obstructive
hydrocephalus
)
are
reported
.
A
42
-
year
-old
man
presented
with
chronic
headache
and
behavior
abnormalities
.
Magnetic
resonance
imaging
revealed
supratentorial
ventricular
dilation
caused
by
an
obstruction
of
the
sylvian
aqueduct
by
a
developmental
venous
anomaly
.
An
18
-
year
-old
man
complained
of
intermittent
headaches
.
The
magnetic
resonance
imaging
scan
disclosed
aqueductal
stenosis
-
type
hydrocephalus
secondary
to
an
ectatic
vein
.
Both
patients
underwent
endoscopic
third
ventriculostomy
and
recovered
well
.
During
the
procedures
,
the
aqueductal
obstruction
by
venous
elements
could
be
seen
clearly
.
Venous
anomalies
may
cause
obstructive
hydrocephalus
and
can
be
suspected
in
cases
of
chronic
and
intermittent
headaches
.
Endoscopic
third
ventriculostomy
is
an
effective
treatment
.