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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 23:1577-1579, October 2002
© 2002 American Society of Neuroradiology

Case Report
INTERVENTIONAL

Rapid Enlargement of a Posterior Communicating Artery Aneurysm after Guglielmi Detachable Coil Treatment of Ipsilateral Carotid Artery Aneurysms

D. T. Jeck^a, J. R. Leonard^a, D. T. Cross, III^a, C. J. Moran^a, R. G. Dacey, Jr^a and C. P. Derdeyn^a

^a From the Department of Radiology, Interventional Neuroradiology, Mallinckrodt Institute of Radiology, St. Louis, MO

Address reprint requests to D.T. Jeck, Department of Radiology, Neuroradiology, 510 S. Kingshighway, St. Louis, MO 63110

Summary: This case illustrates rapid aneurysm enlargement, presumably due to altered hemodynamics resulting from endovascular treatment of aneurysms on the same artery. We postulate that increased hemodynamic force directed to the inflow zone of the posterior communicating artery aneurysm was caused by the treatment of the two ophthalmic artery aneurysms. Originally, many of the flow vectors may have been directed into the larger ophthalmic segment aneurysm, located on the outside of the curve of the internal carotid artery. After treatment, flow may have been directed more smoothly around the carotid siphon and into the posterior communicating artery aneurysm.