Table 4. Immunohistochemical staining.
| Protein | P-value | |
|---|---|---|
| EGFR (+) | 20 (35%) | |
| EGFR (-) | 27 (47%) | P < 0.05 |
| p53 (+) | 27 (47%) | |
| p53 (wt) | 4 (14%) | P < 0.05 |
| Mutant IDH1 (+) | 0 (0%) | |
| Mutant IDH (-) | 22 (38%) | |
| Ki index (< 30%) | 26 (77%) | NS |
| Ki index (31 to 50%) | 5 (15%) | |
| Ki index (>50%) | 3 (9%) |
Legend: EGFR = epidermal growth factor receptor. IDH1 = isocitrate dehydrogenase. Ki index = Antigen Ki-67 index. EGFR (+) = positive staining for the epidermal growth factor receptor. EGFR (-) = no staining for the epidermal growth factor receptor was present. P53 (+) = presence of p53 immunohistochemical staining. P53 (wt)- wt = wild type. No immunohistochemical p53 staining was found. Total simple size for EGFR was 47 patients. Total simple size for P53 staining was 31. IDH1 staining was available in 22 patients. Ki index was available in 34 patients.