Related Experiment Video
Updated: Jul 2, 2026

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm
Published on: August 1, 2025
[Ruptured pseudoaneurysm of the renal artery associated with segmental arterial mediolysis]
Kosuke Mizutani1, Mina Kikuchii, Hiroshi Kondo
1Department of Urology, Gifu University Graduate School of Medicine.
Abstract:
We present a 71-year-old woman with spontaneous perinephric hematoma due to a rupture of pseudoaneurysm of the right renal artery on the fourth day after radical cystectomy and bilateral ureterocutaneostomy for bladder cancer. This patient received steroid therapy for chronic rheumatoid arthritis for several years. The digital subtraction angiography of the right renal artery showed two pseudoaneurysms in the anterior inferior segmental branch and the posterior inferior segmental branch. Transarterial coil embolization of the right renal artery proximally and distally to the two aneurysms was performed without complications. Moreover, the additional angiography showed typical string-of-beads appearance and small aneurysms in abdominal visceral arteries, suggesting segmental arterial mediolysis (SAM) as a possible etiology. Differential diagnoses of SAM are discussed.
Related Concept Videos
Aneurysm I: Introduction
Blood and Nerve Supply to the Kidney
Bloody Supply to the Kidneys:
The kidneys receive their blood supply from the renal arteries, which branch off from the abdominal aorta—the main artery supplying the abdomen and lower body. The renal arteries enter the kidneys at the hilum, a notch on the medial side of each...
Aneurysm III: Interprofessional Care
Acute Kidney Injury II: Pathophysiology
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
