Figure 2.

H&E staining of normal cerebral artery, CA induced by elastase, and CA treated with PCA-50 and 100 mg/kg (a–h). Squares in f–h images are enlarged to show staining with anti-CD68-positive cells revealing that a majority of leukocytes in intracranial aneurysms were macrophages. 2G shows numerous leukocytes noticed in intracranial aneurysms indicating the distribution of macrophages was identical to that of leukocytes. Scale bar for a and e: 500 µm. Scale bar for b–d: 100 µm. Scale bar for f–h: 20 µm.