MAGEA1 and astrocytoma (excluding glioblastoma): Bodey et al studied the expression of MAGE-A1 protein in childhood astrocytomas using an immunocytochemical method and observed that positively-stained cells were present in high-grade, but not low-grade, astrocytomas, suggesting that MAGE-A1 may be an indicator of childhood astrocytoma progression (13).