FIG 4. Patient with a 6-mm aneurysm of the AcomA that was treated with GDCs. Only the left carotid angiogram showed the aneurysm at initial DSA.

A, Left carotid artery angiogram obtained 12 months after treatment. Frontal head view shows no recurrent aneurysm.

B, Contrast-enhanced MRA image obtained with MIP reconstruction shows a hyperintense area (arrowhead) at the site of the AcomA. This finding was misinterpreted as a residual aneurysmal neck.