A 40-year-old male patient was referred to our emergency room with non-specific symptoms such as becoming progressively more agitated and a change in personality. While taking his medical history with his wife, she described a sudden onset of symptoms during sexual intercourse which then worsened. A scheduled CT scan revealed a basal subarachnoid hemorrhage graded at Hunt and Hess II, Fisher IV, due to a ruptured wide-neck basilar bifurcation aneurysm. After an initial unsuccessful treatment attempt using just a coil to occlude the aneurysm, the patient was successfully treated with a WEB device. The treatment of basilar artery bifurcation aneurysms with efferent arteries incorporation using a Woven EndoBridge (WEB) is the main topic of this chapter.
