PR. J. BORIES / CNRI / SCIENCE PHOTO LIBRARY PR. J. BORIES / CNRI / SCIENCE PHOTO LIBRARY
Arterial aneurism. X-ray of a section through the neck of a patient showing an aneurism (upper centre-right) in the external carotid artery near the carotid bifurcation. An aneurysm occurs when an artery wall weakens and swells like a balloon. If it bursts, an aneurysm can cause severe internal haemorrhage.
Model release not required. Property release not required.