TY - JOUR T1 - Republished: Intracranial pseudoaneurysm after intracranial pressure monitor placement JF - Journal of NeuroInterventional Surgery JO - J NeuroIntervent Surg SP - e3 LP - e3 DO - 10.1136/neurintsurg-2014-011410.rep VL - 8 IS - 1 AU - Kushal J Shah AU - Aaron M Jones AU - Paul M Arnold AU - Koji Ebersole Y1 - 2016/01/01 UR - http://jnis.bmj.com/content/8/1/e3.abstract N2 - Traumatic intracranial pseudoaneurysms are a rare but severe complication following arterial injury. Pseudoaneurysm formation can occur secondary to blunt or penetrating trauma or iatrogenic injury. We report a case of traumatic pseudoaneurysm secondary to placement of an intracranial pressure (ICP) monitor. A 27-year-old man was involved in a motorcycle accident resulting in multiple intracranial hemorrhages. The patient underwent craniectomy and placement of an ICP monitor. 17 days later he developed dilation of his left pupil, with imaging demonstrating a new hemorrhage in the vicinity of the previous ICP monitor. A cerebral angiogram confirmed a left-sided distal M4 pseudoaneurysm which was treated by n-butyl cyanoacrylate embolization. Intracranial pseudoaneurysm formation following neurosurgical procedures is uncommon. Delayed intracranial hemorrhage in a region of prior intracranial manipulation, even following a procedure as ‘routine’ as placement of an ICP monitor, should raise the suspicion for this rare but potentially lethal complication. ER -