You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is the commonest cause for biliary stricture? and explain in detail?
It is good to memorize the fact that procedures like ERCP can predispose to biliary strictures. Other causes include chronic inflammation secondary to gall stones, stenosis of sphincter of oddi or papillitis, cholangiohepatitis due to Opisthorchis sinesis or other parasites, cholangiocarcinoma, primary sclerosing cholangitis.