Graded Prognostic Assessment for GI Cancer (GI-GPA)Loading...Karnofsky Performance Score< 80080+190-100+2Age, years≥ 600< 60+0.5Extracranial metastasesPresent0Absent+0.5Number of brain metastases> 302-3+0.51+1适用指征洞见与注意事项