title: Portal venous stent placement in patients with pancreatic and biliary neoplasms invading portal veins and causing portal hypertension: initial experience.
abstract: OBJECTIVE
  To evaluate the clinical usefulness of portal venous stent placement in patients with pancreatic or biliary neoplasms invading portal veins and causing portal hypertension.
  
  
  METHODS
  Thirteen patients underwent portal venous stent placement because of gastrointestinal bleeding (n = 8), risk of gastroesophageal varix rupture (n = 4), ascites (n = 4), thrombocytopenia (n = 3), and/or portal venous thrombosis (n = 3). The main portal vein or both the intrahepatic and main portal veins were invaded in six patients (group A). The main portal vein and splanchnic veins were involved in seven patients (group B). Stents were placed across the stenotic (n = 8) or occluded (n = 5) lesions after percutaneous transhepatic portography. Changes in portal venous pressure, stent patency, and survival were evaluated.
  
  
  RESULTS
  Mean portal venous pressure decreased significantly immediately after stent placement, from 24.9 mm Hg +/- 5.9 (SD) to 15.8 mm Hg +/- 4.6 (P <.001). In group A, blood flow through the stent was maintained and the symptoms had subsided at follow-up (mean, 12.5 months). In group B, symptoms were improved in five patients, but the stents were occluded in all but one patient at a mean follow-up of 1.5 months. There was a significant difference in stent patency between the patients with (14%) and those without (100%) splanchnic venous involvement (P <.01).
  
  
  CONCLUSIONS
  Stent placement helped to relieve portal hypertension symptoms. Splanchnic venous involvement was associated with worse stent patency.
authors: Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan. yama@clin.medic.mie-u.ac.jp
authors: K
authors: K
authors: Yamakado
authors: A
authors: A
authors: Nakatsuka
authors: N
authors: N
authors: Tanaka
authors: A
authors: A
authors: Fujii
authors: S
authors: S
authors: Isaji
authors: Y
authors: Y
authors: Kawarada
authors: K
authors: K
authors: Takeda
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000150:complications* / Q000175:diagnosis; D001651:Cholestasis, Extrahepatic / Q000150:complications* / Q000175:diagnosis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006975:Hypertension, Portal / Q000209:etiology* / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010190:Pancreatic Neoplasms / Q000150:complications* / Q000175:diagnosis; D011169:Portal Vein / Q000000981:diagnostic imaging / Q000473:pathology; D011172:Portography; D011336:Probability; D015607:Stents; D016896:Treatment Outcome; D014654:Vascular Patency