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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 25:1080-1082, June-July 2004
© 2004 American Society of Neuroradiology

Case Report
INTERVENTIONAL

Dispersion of Coils after Parent-Artery Occlusion of Radiation-Induced Internal Carotid Artery Pseudoaneurysm

Hiro Kiyosue^a, Mika Okahara^a, Shuichi Tanoue^a, Yoshiko Sagara^a, Shunro Matsumoto^a, Hiromu Mori^a, Miori Arita^b, Tetsuo Watanabe^b and Masashi Suzuki^b

^a Department of Radiology, Oita Medical University, Oita, Japan
^b Department of Othorhinolaryngology, Oita Medical University, Oita, Japan

Address correspondence to Hiro Kiyosue, MD, Department of Radiology, Oita Medical University, 1–1 Hasama, Oita, 879–55, Japan

Summary: We report a rare complication following parent-artery occlusion in a patient with radiation-induced carotid pseudoaneurysms. Both the right internal carotid artery pseudoaneurysm and the recurrent external carotid artery pseudoaneurysm were treated by parent-artery occlusion with coils. Although rebleeding was not observed after the second embolization, angiography and endoscopy at the 12-month follow-up showed dispersion and migration of coils into the pharynx and the external auditory canal due to progressive radiation necrosis.