Cholangiocarcinoma is a type of cancer that forms in the bile ducts, which are tubes that carry bile from the liver to the small intestine. This cancer can occur anywhere along the bile ducts, both inside and outside the liver. Symptoms may include jaundice, abdominal pain, and weight loss, making it important to seek medical attention if these signs appear. The exact cause of cholangiocarcinoma is not fully understood, but certain risk factors, such as primary sclerosing cholangitis and liver fluke infections, can increase the likelihood of developing this disease. Early diagnosis is crucial for better treatment outcomes, as the cancer can be aggressive and challenging to treat.