A 5-French catheter was inserted into the common hepatic artery via the right femoral artery. Before steroid injection, angiography was performed to detect any anomalies in the hepatic artery. If no replaced hepatic artery was found, the tip of the catheter was set at the proper hepatic artery. If there were 2 hepatic arteries, the catheter was positioned in the branch with the most expansive feeding area. After insertion, 1000 mg of methylprednisolone was infused over 1 hour each day for 3 days, and the catheter was removed immediately after injection on the third day. A once-daily plasma exchange was added to the regimen if a bleeding tendency was observed during this procedure.