Figure 3From: MGMT promoter methylation status and MGMT and CD133 immunohistochemical expression as prognostic markers in glioblastoma patients treated with temozolomide plus radiotherapy Representative photomicrographs illustrating different percentages of CD133 stained tumor cells corresponding to being scored as +/− (A), 1+ (B and C), 2+ (D), 3+ (E) (see methods) (20×). Back to article page