ABSTRACT
BACKGROUND
Subarachnoid
hemorrhage (SAH) secondary to rupture of an intracranial aneurysm (IA)
is a devastating condition with high morbidity and mortality.
Individuals with a positive family history of aneurysmal SAH (aSAH) or
IA can have an increased risk for aSAH or IA themselves. Screening is
currently recommended in families with ≥ 2 affected first degree
relatives.
OBJECTIVES
To
assess the usefulness and cost-effectiveness of IA screening in
individuals with a positive first-degree family history, relative to the
number of family members affected.
METHODS
We
performed a systematic literature search using Pubmed and Google
Scholar and identified additional studies by reviewing reference lists.
Only original studies and review papers were considered. We excluded
genetic diseases associated with IA and studies with unclear data
concerning the number of first- versus second-degree relatives affected.
RESULTS
This
review included 37 articles. Individuals with ≥ 2 affected first degree
relatives had a higher prevalence of IA (average 13.1% vs. 3% in the
general population). Similarly, we found a higher prevalence of IA in
individuals with ≥ 1 affected first degree relative (average 4.8%, up to
19% in individuals with additional risk factors). The risk of aSAH was
also increased in both categories. Recent studies stressed the
importance of serial screening over time and suggested that such
screening can be cost-effective in persons with only one first-degree
relative with IA or aSAH.
CONCLUSION
While
current guidelines do not recommend screening individuals with ≥ 1
first degree relative affected, we found strong arguments in favor of
this approach.
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