1. Preoperatively

* Patients with stent treated tumor in the pancreatic head or periampullary planned for pancreaticoduodenectomy

* The patient jaundice should have worn off and there should be no signs of duodenal obstruction

* The patient has given informed consent after verbal and written information in accordance with approved ethics application

* The patient has no anatomical conditions making endoscopic therapy impossible such as previous Billroth II or Gastric Bypass.

2. Intraoperatively

* Peroperative findings of of carcinomatosis, metastases or local irresectability who oppose radical surgery

* Surgical double bypass should be technically feasible

* The patient has given informed consent after verbal and written information in accordance with approved ethics application

Double Bypass Versus Stent-treatment in Irresectable Pancreatic Cancer