Successful coil embolization of a ruptured aneurysm of the arc of Riolan artery

Hirotatsu Sato; Tetsuo Sonomura; Hironobu Ihira; Akira Ikoma; Nozomu Shima; Tomoya Fukui; Kodai Fukuda; Shota Ueda; Ryuta Okuhira; Nobuyuki Higashino; Atsufumi Kamisako; Ryota Tanaka; Takao Koyama; Hiroki Minamiguchi

doi:10.1016/j.radcr.2022.10.096

Successful coil embolization of a ruptured aneurysm of the arc of Riolan artery

Radiol Case Rep. 2022 Nov 24;18(2):486-490. doi: 10.1016/j.radcr.2022.10.096. eCollection 2023 Feb.

Affiliations

¹ The Department of Radiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama 641-8510, Japan.
² The Department of Emergency and Critical Care Medicine, Wakayama Medical University, Wakayama City, Wakayama, Japan.

Abstract

The arc of Riolan (AOR) is an anastomosis between the middle and left colic arteries. Aneurysms of the AOR are very rare visceral artery aneurysms. A 44-year-old man presented with abdominal pain and loss of consciousness. Computed tomography and angiography showed hemorrhagic ascites around the liver and spleen. An irregularly dilated artery was visible within a hematoma in the upper left region of the abdomen, consistent with a ruptured pseudoaneurysm of the AOR. Transcatheter arterial embolization was performed with microcoils. The patient's abdominal pain disappeared after embolization, and no symptoms of intestinal ischemia were observed. To our knowledge, this is the first case of an AOR aneurysm with AOR dilation due to dissection of the celiac artery that was successfully treated by coil embolization.

Keywords: Arc of Riolan; Segmental arterial mediolysis; Visceral artery aneurysm.

Publication types

Case Reports