Fig. 1From: Cell-free microRNA-21: biomarker for intracranial aneurysm ruptureDiagram of 4 groups. a Angiography negative group (control group). b Aneurysm without daughter aneurysm group (relatively low-rupture risk group). c Aneurysm with daughter aneurysm group (relatively high-rupture risk group). d Ruptured aneurysm groupBack to article page