Staged treatment of a blood blister-like aneurysm with stent-assisted coiling followed by flow diverter in-stent insertion. A case report.

Blood blister-like aneurysms (BBLA) are rare lesions sometimes difficult to recognize and in most cases associated with diffuse subarachnoid haemorrhage and severe clinical conditions. BBLA are life-threatening because they tend to enlarge rapidly and to rebleed, and no consensus has so far been reached on the best management strategy. We describe a patient with a BBLA in the right ICA treated successful by a two-stage embolization procedure first with coils and an open cell stent (Neuroform 3) and later by further coil placement and insertion of a flow-diverting stent (Silk).