We report a case of a 71-year old woman with right inferior epigastric artery pseudoaneurysm following laceration by a computed tomography-guided 18G biopsy needle. The laceration was initially treated with placement of retained sutures; however the patient turned hemodynamically unstable 41 days later. Percutaneous ultrasound-guided injection of 1500 U of thrombin solution resulted in almost complete thrombosis of the pseudoaneurysm; however 24 hour control ultrasound revealed refilling of the pseudoaneurysm. Definite treatment was achieved by transcatheter coil embolization. Inferior epigastric artery pseudoaneurysm with underlying laceration may not respond to percutaneous thrombin injection, whereas coil embolization is shown to be effective.