RESUMO
Malignant obstructive jaundice is caused by biliary obstruction due to malignant tumor,and in clinical practice percutaneous transhepatic biliary metal stent implantation has already become one of the main measures to relieve malignant obstructive jaundice.Nevertheless,postoperative complications severely affect the life quality and survival of patients,especially the stent restenosis seriously influences the patient's prognosis,therefore,after percutaneous transhepatic biliary metal stent implantation the use of active preventive measures and the correct treatment of stent restenosis are particularly important.The causes of stent restenosis include tumor growth,cholestasis and proliferation of granulation tissue,and the main measures to prevent stent restenosis at present are re-implantation of the stent,reformation of the stent structure and combination therapy.This article aims to make a comprehensive reviewabout the causes of postoperative stent restenosis and the effective preventive measures.