Figure 2:

Illustration of operation plan. Gray blade with blue spring represent aneurysm clips. Possible surgical options based on the preoperative images are as follows: (a) direct clipping if possible. (b) Neck clipping combined with anastomosis of superior division of the frontal branch-graft from superficial temporal artery (red bar). (c) Trapping of aneurysm combined with double-barrel bypass via two branches of superficial temporal arteries (red bars).