Hepatic Artery Pseudoaneurysm: A Report of Seven Cases and a Review of the Literature

Purpose To analyze seven cases of hepatic artery pseudoaneurysm (HAP) encountered at our hospital and review the relevant literature.Methods We searched the computerized medical record database from January 1, 1996, to September 1, 2003, to identify all cases of HAP, which we then reviewed in detail, examining etiology, findings, laboratory data, therapeutic intervention, complications, and outcome. We then compared these findings with those reported in the literature.Results There were five cases of HAP among 18 015 trauma and surgical admissions to the University of California Irvine Medical Center, representing an incidence of 0.03%. There were an additional two cases of HAP among 200 orthotopic liver transplants (OLT). The five HAPs not associated with OLT were preceded by blunt abdominal trauma, liver biopsy, pancreatic pseudocyst, and polyarteritis nodosa, in one patient each, and there was no apparent cause in one patient. Two patients were treated by ligation, and the patients with post-OLT HAP underwent resection and replacement with saphenous bypass grafts. Successful embolization was performed in the other three patients.Conclusion Hepatic artery pseudoaneurysm is a rare but dangerous complication of both acute surgical and chronic injury to the hepatic artery. However, early diagnosis and intervention can result in an excellent long-term outcome.