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 meall 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.
Teiripe scian prótón
Mar sin, i gcomparáid le radaiteiripe traidisiúnta, tá tréithe fisiceacha agus bitheolaíocha níos fearr ag teiripe scian prótóin, agus tá dáileog leordhóthanach radaíochta aige chun siadaí a bhaint amach i gcodanna níos doimhne an chomhlachta. Is féidir le hiain throm agus prótóin fíocháin a bhaint amach 30 cm domhain faoin gcraiceann, rud a fheabhsaíonn go mór an cumas chun an meall a rialú; i gcomparáid le modhanna radaíochta traidisiúnta, is féidir an fuinneamh radaíochta a shroicheann an suíomh meall a mhéadú go mór (is féidir scian prótón a mhéadú 20%), rud a laghdaíonn go mór imeall an meall. Damáiste agus fo-iarsmaí na bhfíochán gnáth; tocsaineacht gnáth-fhíocháin a laghdú le cur i bhfeidhm comhuaineach radaiteiripe agus ceimiteiripe; an cúrsa cóireála a ghiorrú go suntasach tríd an dáileog laethúil radaíochta a mhéadú; laghdú ar mhinicíocht siadaí dara bunscoile.