In another study, fever of 37.8 °C and above, WBC > 9000/μL or <4000/μL, and CRP increase within seven days after ERCP, were regarded as indices of post-ERCP cholangitis, and post-ERCP cholangitis rates were calculated as 40.7% after plastic stent placement in patients with cholangiocarcinoma [16]. Here, CRP is linked to cholangitis.