Patient: Description of condition (onset, main symptoms, hospital visited, etc.): Discovered in 2005, had a CT exam at Lanzhou Military General Hospital and MRI twice, and had another CT exam at Shanghai Changhai Hospital this month. Only tests were done, and both Lanzhou and Shanghai confirmed the diagnosis of malignant tumor and told to review it once a year. What is the best treatment available. Doctor: The malformation tumor is benign! From the size, there is no indication for surgery at present, regular review is recommended Patient: Thank you Dr. Zhao Lei, your reply is consistent with the expert interview at Shanghai Changhai Hospital, thank you for your reply.