Patients with obstructive jaundice due to periampullary tumor can temporarily be relieved of their jaundice with transpapillary stenting at endoscopic retrograde cholangio-pancreatography (ERCP) prior to operation. Usually plastic stents are used. Hypothesis: Self expanding metallic stents offer a be a better alternative for preoperative stenting in patients with obstructive jaundice due to periampullary tumour obstruction.
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Degree and amount of bile bacterial contamination at the time of resection
Timeframe: Time at the operation