Bile duct cancer, also known as cholangiocarcinoma, is a rare type of cancer that occurs in the bile ducts, which are tubes that carry bile from the liver to the small intestine. This cancer can develop in different parts of the bile duct system, including the intrahepatic (inside the liver) and extrahepatic (outside the liver) bile ducts. Symptoms may include jaundice, abdominal pain, and weight loss. Diagnosis typically involves imaging tests like CT scans or MRIs, along with a biopsy to confirm the presence of cancer cells. Treatment options may include surgery, chemotherapy, and radiation therapy, depending on the cancer's stage and location. Early detection is crucial for improving outcomes.