Cholangiocarcinoma 3 cm is required to be surgically removed. Cholangiocarcinoma is a tumor located in the bile ducts inside and outside the liver, there are benign and malignant respectively, but clinically benign is less common than malignant. 1. Benign cholangiocarcinoma: It is rare in clinic, mostly adenomas, but also some fibromas and smooth muscle tumors. Even if they are benign, surgical resection is recommended. 2. Malignant tumors: jaundice, anorexia, abdominal mass, change of stool color, etc., which can be diagnosed by liver function tests and tumor markers. After diagnosis, as long as the patient’s physical condition permits, surgical resection should be performed as soon as possible. For those whose conditions do not allow surgical resection, minimally invasive methods such as placement of stents under endoscopic imaging can be chosen to alleviate clinical symptoms. It is recommended to actively cooperate with the doctor for surgical treatment, and follow the doctor’s instructions for regular use of medication after surgery to avoid blind use of medication and delay of the disease.