The principles and objectives of surgery include the following: complete resection of the tumor as far as possible; to ensure the relief of intracranial hypertension after surgery; surgery should relieve or at least partially relieve the compression of important neural structures; for tumors that cannot be completely resected, as much as possible should be removed to achieve sufficient internal decompression to create conditions for later radiotherapy and chemotherapy; for patients with cerebrospinal fluid circulation obstruction, the main purpose of surgery is to relieve the obstruction and restore circulation; surgery can Surgery can clarify the histological type of tumor. The brain tissue of pediatric patients is developing and has strong compensatory ability, so the recovery of neurological damage after surgery is faster than that of adults. For breast fibroadenoma, surgery is generally recommended to remove the tumor. After the lump is removed, the physician has to perform rapid frozen section and ordinary paraffin section to understand the nature of the lump, which is the true diagnosis. 2, after the lump is completely removed by surgery, the tumor can be prevented from continuing to grow, which also has positive significance in preventing the tumor from becoming cancerous. Surgery is considered to be the only credible treatment method; 4.Surgery does not leave large scars and affect the appearance of breast and future breastfeeding as some patients worry. Even if the diagnosis of mammary fibroadenoma has been confirmed, the lump may grow faster during the wait-and-see process, and if breastfeeding and pregnancy factors are excluded, the physician should consider it as a mucinous or malignant change of the tumor, and the loss will be more tragic if the breast is removed at that time; 6. This will enable both diseases to be treated reasonably.