The common causes of middle hyperechoic nodule in 10 months after liver cancer surgery include postoperative repair of liver cancer, hepatic hemangioma, recurrence of liver cancer and so on. 1. Postoperative repair of liver cancer: Liver cancer surgery usually involves resection of cancerous nodules, and the resection process will surely damage liver tissues, in the healing process afterwards, liver tissues will undergo fibrous repair, and the repaired tissues will show hyperechoic in the process of rechecking, which is a normal phenomenon and does not require special treatment. 2. Hepatic hemangioma: During liver cancer surgery, blood vessels will be ligated, which will cause malformation of liver blood vessels and lead to the occurrence of hepatic hemangioma, which can be detected as a hyperechoic mass in the examination. 3. Recurrence of liver cancer: when liver cancer recurs after surgery, hyperechoic nodules will be found in the follow-up examination, which may need to be surgically resected again or undergo comprehensive treatment. There may be other reasons, such as intrahepatic bile duct stones or calcified foci, etc. It is recommended to go to the hospital for timely consultation, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.