Phase II Exploratory Study of Sequential Triple Therapy (Temozolomide/Anlotinib/Bemarituzumab) in Combination With Concurrent Radiotherapy With Temozolomide and Anlotinib for the Maintenance Treatment of Diffuse Midline Gliomas in Children

"Starting from 30 days after radiotherapy, adjuvant temozolomide was orally administered at a dose of 150mg/m2. The dosage of temozolomide was adjusted to 200mg/m2 starting from the second cycle, with continuous use for 5 days per week and a 23 day hiatus. Oral administration for a total of 6 cycles.~The start time of oral administration of anlotinib after radiotherapy follows the cycle of radiotherapy, with continuous oral administration for 2 weeks and cessation for 1 week. Until the side effects are intolerable or the tumor progresses. The maximum duration shall not exceed 24 months.~Begin treatment with bemarituzumab 24 hours after radiotherapy, with a body weight of\>=45kg, intravenous injection of 200mg, once every 3 weeks. Weight\<45kg, 100mg intravenous injection, once every 3 weeks. Until the side effects are intolerable or the tumor progresses. The maximum duration shall not exceed 24 months."