Ruptured Intrahepatic Arterial Aneurysm due to Segmental Arterial Mediolysis Treated with Coil Embolization.

Authors

Yurika Hata, Motoyasu Tabuchi, Shinya Sakamoto, Shuta Tamura, Sunao Uemura, Teppei Tokumaru, Rika Yoshimatu, Takehiro Okabayashi

Published in

Acta medica Okayama. Volume 80. Issue 5. Pages 327-332.

Abstract

A 67-year-old man presented with sudden-onset abdominal pain and hemorrhagic shock. Contrast-enhanced CT revealed a large hematoma in hepatic segments VI-VII with capsular rupture and hemoperitoneum. CT angiography demonstrated a saccular pseudoaneurysm in a posterior segmental branch of the right hepatic artery and a beaded appearance with irregular dilatation and segmental narrowing of the right hepatic artery branches, without inflammatory or atherosclerotic findings, supporting a diagnosis of segmental arterial mediolysis (SAM). Emergency angiography followed by coil embolization achieved hemostasis. Follow-up CT at 5 months showed complete exclusion of the aneurysmal lesions, with no evidence of recurrence or new vascular lesions. Coil embolization may be an effective, minimally invasive option for ruptured intrahepatic SAM lesions.

PMID:
42934930
Bibliographic data and abstract were imported from PubMed on 27 Oct 2026.

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