Pneumobilia , type 2 biliary abnormality , type 1 biliary abnormality , diabetes mellitus , tumour number ( 3 ) , tumour size ( 3cm ) , and tumour necrosis on the pre-transarterial chemoembolization computed tomography , and gelfoam embolization and vessel injury during transarterial chemoembolization were all significant predisposing factors for liver abscess after transarterial chemoembolization .