Narrator: This is Science Today. For years,
doctors have debated the value of surgically treating
all unruptured cerebral aneurysms. While most do
require surgical treatment, a new University of
California, San Francisco study suggests that in
a large subset of patients, such treatment is unnecessary.
Dr. Clay Johnston, an assistant professor of neurology
was lead author of the study.
Johnston: Previously, people, the numbers
they had found were around one - one of those hundred
would have a rupture in one year. And clearly at
those levels, treatment was justified. But the new
study's much larger than the previous ones, had
found that in sub groups of patients, in ones with
very small aneurysms where they hadn't had a ruptured
aneurysm elsewhere, that their rupture rates were
very, very low - in fact, one twentieth of one percent
Narrator: This new information is reassuring
to patients who had formerly thought of unruptured
aneurysms as time bombs.
Johnston: They don't have a time bomb and
they can go on and live their life normally and
not necessarily expect to have any problems whatsoever
from the aneurysm.
Narrator: For Science Today, I'm Larissa Branin.