PHASES Score
Predicts 5-year risk of rupture of intracranial aneurysms.
INSTRUCTIONS
Use this score to calculate the 5-year risk of rupture of cerebral aneurysms that are found incidentally on imaging.
This score was derived only from North American, European, Japanese, and Finnish populations. Score should be interpreted with caution if using outside of these populations.
When to Use
North American, European (other than Finnish)
0Japanese
+3Finnish
+5No
0Yes
+1<70 years
0≥70 years
+1<7.0 mm
07.0-9.9 mm
+310.0-19.9 mm
+6≥20.0 mm
+10No
0Yes
+1Internal carotid artery (ICA)
0Middle cerebral artery (MCA)
+2Anterior cerebral arteries (ACA), posterior communicating artery, posterior circulation
+4Result:
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