1. Transnasal Penetration of a Ballpoint Pen: Case Report and Review of Literature 
Ha Son Nguyen, Akinwunmi Oni-Orisan, Ninh Doan, Wade Mueller 
World Neurosurgery 
Volume 96, Pages 611.e1-611.e10 (December 2016)
DOI: /j.wneu
Copyright © 2016 Elsevier Inc. Terms and Conditions

2. Figure 1
Lateral scout film from CT demonstrating the trajectory of the ballpoint pen.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

3. Figure 2
Serial axial images of preoperative noncontrast CT of the head.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

4. Figure 3
Serial axial images of preoperative CT angiography demonstrating nonopacification of the right ICA from the mid-petrous segment to the ophthalmic segment.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

5. Figure 4
Pre-embolization DSA. (A and B) Right common carotid artery injection: anterior-posterior (A) and lateral (B) projections demonstrating right ICA injury. (C) Left ICA injection: anterior-posterior projection demonstrating robust collateral reconstitution of the intracranial right ICA circulation through the right posterior communicating artery and anterior communicating artery.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

6. Figure 5
Postembolization DSA. (A and B) Right ICA injection: lateral projections demonstrating lack of flow distal to the carotid bulb and location of coil treatment. (C and D) Left ICA injection: anterior-posterior projections demonstrating persistent collateral reconstitution of the intracranial right internal carotid circulation after coil treatment.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

7. Figure 6
Postoperative CT (A and B), T1-weighted MRI with contrast (C), and T2-weighted MRI FLAIR (D) images.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

8. Figure 7
Postoperative apparent diffusion coefficient and diffusion-weighted MRI sequences demonstrating no significant ischemic stroke.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions

9. Figure 8
Postoperative magnetic resonance angiogram of the head confirming persistent reconstitution of collateral circulation through the right carotid circulation.
World Neurosurgery  , 611.e1-611.e10DOI: ( /j.wneu )
Copyright © 2016 Elsevier Inc. Terms and Conditions