Pneumobilia , type @ biliary abnormality , type @ biliary abnormality , diabetes mellitus , tumour number ( @ ) , tumour size ( @cm ) , 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 .