Young Man With Unilateral Neck Swelling Alexander Hart, MBBS, Michael Brzozowski, MD, FRCPC, Jordan Chenkin, MD, FRCPC  Annals of Emergency Medicine  Volume 72, Issue 2, Pages e13-e14 (August 2018) DOI: 10.1016/j.annemergmed.2018.02.012 Copyright © 2018 American College of Emergency Physicians Terms and Conditions

Figure 1 Point-of-care ultrasonographic image (sagittal view) generated over the right fluctuant neck mass, demonstrating the brainstem and spinal cord (red arrow) and overlying cerebrospinal fluid (white arrowhead). In the near field, there is a fluid collection in the extradural space (white arrow). Annals of Emergency Medicine 2018 72, e13-e14DOI: (10.1016/j.annemergmed.2018.02.012) Copyright © 2018 American College of Emergency Physicians Terms and Conditions

Figure 2 Axial CT image slice of the brain, demonstrating a collection of fluid in the extradural space (red arrow) extending through the surgical bone window (red arrowhead). Annals of Emergency Medicine 2018 72, e13-e14DOI: (10.1016/j.annemergmed.2018.02.012) Copyright © 2018 American College of Emergency Physicians Terms and Conditions