Intracranial subdural hematoma following spinal anesthesia: case report and review of the literature.

Postdural puncture headaches represent one of the main complications of spinal anesthesia. Sometimes, they can reveal the presence of an intracerebral hemorrhage or intracranial subdural hematoma. Atypical postdural puncture headaches or secondary alterations of a typical headache, and particularly the disappearance of its postural character, must prompt to search for another cause. Early diagnosis and careful and rapid management are mandatory. We here report the case of a 53-year-old woman who presented with an intracranial subdural hematoma following spinal anesthesia for hallux valgus surgery performed 48 hours earlier. The implications of such a diagnosis are then discussed, in the light of the existing literature.