Backes et al reported the ELAPSS score for predicting growth of an incidental intracranial aneurysm. This can help to identify a patient who may benefit from an intervention to reduce risk. The authors are from multiple institutions from Europe, Japan, Hong Kong and Canada.
Patient selection: incidental intracranial aneurysm, member of study population group
Outcome: 3-year or 5-year risk of aneurysm growth
Parameters:
(1) early SAH (E)
(2) location (L)
(3) age (A)
(4) population (P)
(5) size of aneurysm in mm (S)
(6) shape of the aneurysm (S)
Parameter
Finding
Points
earlier SAH
no
0
yes
1
location of aneurysm
internal carotid (ICA), ACA, ACOM
0
middle cerebral (MCA)
3
posterior circulation
5
population
North American, China, non-Finnish European
0
Japanese
1
Finnish
7
age
< 60 years
0
>= 60 years
1 per 5 y
size
< 3 mm
0
3 to 4.9 mm
4
5 to 6.9 mm
10
7 to 9.9 mm
13
>= 10 mm
22
shape of aneurysm
regular
0
irregular
4
total score =
= SUM(points for all 6 parameters)
Interpretation:
• minimum score: 0
• maximum score: around 49 (depends on age)
• The higher the score the greater the risk of aneurysm growth.
Total Score
3-Year Growth
5-Year Growth
0 to 4
5%
8.4%
5 to 9
7.8%
13%
10 to 14
11.7%
19.3%
15 to 19
18%
28%
20 to 24
26%
40%
>= 25
43%
61%
To read more or access our algorithms and calculators, please log in or register.
