title: Polyurethane-covered Wallstents to recanalize Wallstents obstructed by tumor ingrowth from malignant common bile duct obstruction.
abstract: Four patients with malignant obstruction of the common bile duct had been treated with uncovered Wallstents and suffered from a reobstruction after 2-13 months (mean 5.3 months). Repeat cholangiography revealed severe stenosis of the stent lumen caused by tumor ingrowth through the mesh. A Wallstent with a self-made polyurethane-cover was inserted through the uncovered stent in these patients. The four patients were followed for 3-13 months (mean 6.3 months) until death. There was good drainage with no evidence of recurrent obstruction in all patients. We conclude that a covered Wallstent may extend patency of stented bile ducts, preventing tumor ingrowth in patients with neoplastic obstruction. Further observations are needed.
authors.affiliation: Department of Gastroenterology, Hamamatsu Medical Center, Shizuoka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Kitagawa
authors.forename: Y
authors.initials: Y
authors.lastname: Takehira
authors.forename: M
authors.initials: M
authors.lastname: Yamada
authors.forename: T
authors.initials: T
authors.lastname: Kawasaki
authors.forename: H
authors.initials: H
authors.lastname: Nakamura
mesh_terms: D000368:Aged; D002779:Cholestasis / Q000209:etiology / Q000628:therapy*; D003138:Common Bile Duct Neoplasms / Q000150:complications / Q000473:pathology; D005260:Female; D005706:Gallbladder Neoplasms / Q000150:complications / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010190:Pancreatic Neoplasms / Q000150:complications / Q000473:pathology; D011140:Polyurethanes; D015607:Stents; D014654:Vascular Patency
chemical_list: D011140:Polyurethanes