Myeloblastoma is one of the most common childhood tumors. Among children under 10 years of age, the incidence rate is about 20% to 30% of all tumors. The peak age of onset is 5 years, and men are slightly more than women. The tumor is located in the posterior cervical fovea, near the cerebellar vermis and the fourth ventricle midline, and advanced tumors spread in the cerebrospinal fluid. Typical clinical manifestations are mainly related to the increased intracranial pressure caused by tumor occupying the posterior cranial fossa and blocking the fourth ventricle or midbrain aqueduct: headache, nausea, vomiting, blurred vision, and balance function caused by tumor compression on the cerebellum Obstacles, such as walking instability, ataxia, etc.
Terapija s protonskim nožem
Zato ima terapija s protonskim nožem v primerjavi s konvencionalno radioterapijo boljše fizikalne in biološke značilnosti in ima zadostno dozo sevanja, da doseže tumorje v globljih delih telesa. Težki ioni in protoni lahko dosežejo tkiva pod globino 30 cm globoko, kar bistveno izboljša sposobnost nadzora nad tumorjem; V primerjavi s tradicionalnimi sevalnimi metodami lahko energijo sevanja, ki doseže mesto tumorja, močno povečamo (protonski nož lahko povečamo za 20%), kar znatno zmanjša obod tumorja. Poškodbe in neželeni učinki normalnih tkiv; zmanjšati toksičnost normalnih tkiv s hkratno uporabo radioterapije in kemoterapije; znatno skrajšati potek zdravljenja s povečanjem dnevnega odmerka sevanja; zmanjša pojavnost drugih primarnih tumorjev.