MULTIPLE INTRAHEPATIC ANEURYSMS FOLLOWING TRANSCATHETER ARTERIAL EMBOLIZATION - WORK-IN-PROGRESS

PURPOSE: To discuss the mechanism of multiple intrahepatic aneurysm formation after transcatheter arterial embolization (TAE) performed in five patients with hepatocellular carcinoma. MATERIALS AND METHODS: TAE was performed with gelatin sponge particles and iodized oil as embolic materials. Mytomycin C was also used in four cases. RESULTS: Three to 14 aneurysms 1-6 mm in diameter were found in third-to sixth-order branches of the hepatic arteries at repeat angiography performed 25-45 days after TAE. Follow-up angiograms in three cases revealed that most aneurysms were no longer apparent except in one patient in whom two aneurysms remained and were larger than before. In none of the five cases were any signs of aneurysm rupture noted. CONCLUSION: Radiologists should be aware of this complication of TAE. It is speculated that the main cause of aneurysm formation in these patients was the embolic agents used.