Male, 82 years old, “recurrent abdominal pain for 3 weeks with yellowish skin and eyes for 1 day” was admitted to the hospital on 2012-2-**. The patient presented with subxiphoid abdominal pain 3 weeks ago, slightly relieved by rest and fasting, without chills and fever, discharged after 10 days of hospitalization with fluids and improved symptoms. CT enhancement:Hepatomegaly cyst of about 55mm×106mm×167mm with dilated intrahepatic bile ducts. Gallbladder neck stone, true aneurysm of abdominal aorta, right and left common iliac artery, about 69x61mm, 53x51mm, 30x30mm respectively. MRI: congenital common bile duct cyst or giant hepatic cyst. Gallbladder stones. . Cloacal aneurysm of the middle and lower abdominal aorta with abdominal wall thrombosis. The patient was too old, the origin of the cyst was unknown, and the patient had a large multiple aneurysm, so the risk of serious complications and life-threatening aneurysm rupture was not small. For the sake of medical risk control, referral for out-of-town medical treatment or cyst puncture and drainage becomes an option, while the former brings inconvenience to the patient in terms of moving around, and the latter cannot be completely cured and may lead to abdominal leakage infection. We believe that the development of surgical technology is always a breakthrough in the midst of risks, and that giving the patient a chance to completely cure the disease under the premise of effective risk control can truly benefit the patient. The long-term chronic liver cyst growth compressed the bile duct and right hepatic tissue, resulting in paper-thin liver margins and dilated bile ducts. The postoperative recovery was very smooth and he recovered completely. Experience: The doctor is pleased to save one life is better than building a seven-level pagoda.