Fig. 2.

Digital subtraction angiography (A) and three-dimensional reconstruction from rotational angiography (B) show an unruptured aneurysm at the bifurcation of the middle cerebral artery with a daughter sac. The aneurysm neck is wide and covers the proximal part of the inferior M2 stem. Based on patient preference, the aneurysm was targeted for coiling. During insertion of the framing coil (C), the lower part of the coil protruded into the inferior M2 trunk (arrow) (D), resulting in flow reduction within the vessel. Therefore, the coil was removed. Although stent-assisted coiling was potentially an alternative endovascular option after antiplatelet loading, we assumed an increased risk of periprocedural complications with and the patient underwent microsurgical clipping.