Supplementary Material for: Bilateral Through-and-Through Trajectory of a Low-Velocity Transcranial Penetrating Foreign Object in a Twelve-Month-Old

<br>A 12-month-old girl sustained a penetrating intracranial trauma of a thin aluminum rod traversing from the left frontal bone and exiting the right occipital bone. The rod entered the left anterior frontal lobe, traveled through the ventricular system, narrowly missed the right posterior cerebral artery by less than 1 mm and exited through the right cerebellum. The rod was surgically extracted, and the child remained neurologically intact. Pre- and postoperative vascular imaging, antibiotics, seizure prophylaxis and surgical planning are paramount to successful care of these delicate cases.