Fig. 5

Postoperative cholangiograms for the tubes/catheters. a Satisfactory drainage without obvious leakage at postoperative first month (corresponding to double T-tube drainage); b Satisfactory healing of the cavity without apparent leakage at postoperative third month after withdrawal of decompression T-tube at postoperative one month (corresponding to double T-tube drainage for the same patient in a in this figure); c Qualified drainage without obvious leakage at postoperative first month (corresponding to single T-tube drainage with sutured fistula); d unsatisfactory outcome of the original leakage in cystic cavity at postoperative third month, note that this leakage had not been observed at postoperative first month, which indicated late leakage at original cysto-biliary communication site after withdrawal of decompression T-tube at first month (corresponding to single T-tube drainage with sutured fistula)