A case is reported of an intracranial aneurysm which ruptured after spinal anaesthesia. A 36-year-old man underwent several locoregional anaesthesias for the surgical treatment of an infected lower limb fracture (8 epidural blocks and 1 spinal anaesthesia). After a further spinal anaesthesia, he suffered violent headaches, a meningeal syndrome, restlessness, left hemiplegia and coma. The relationship between such an accident and the anesthesia is discussed in the light of similar cases previously published.