Introduction: Cholemia and bacterial translocation with portal endotoxemia are integral in the pathogenesis of obstructive jaundice (OJ). There is sufficient experimental data about hemodynamic and histopathologic consequences of OJ. On the contrary, pathologic information of renal changes in patients with OJ is still lacking. Therefore; the primary objective of this prospective study is to demonstrate the specific histopathologic changes in kidneys of patients with short-term biliary tract obstruction receiving a standard perioperative medical treatment protocol.