Objective: To identify the relationship between the expression of EGFR and Ki-67 in infiltrating astrocytic tumors and its association with patient's age and sex. Methods: A descriptive cross-sectional study. Histological samples diagnosed with diffuse astrocytoma, anaplastic, and glioblastoma were reviewed from January 1,2008 to December 31,2012. Data were entered in Excel table according to defned variables and subsequently exported to SPSS version 17.0. Were analyzed the variables gender, age, histological grade, percentage of Ki-67 and EGFR immunostaining. Results: 48 patients were identifed with a mean age of 43.2 ± 18.1 years. Slight predominance in males: 22 (45.8 %) women and 26 (54.2 %) men. The highest percentage of cases was found in the group of patients between 21 and 40 years, more frequent in this group diffuse astrocytomas. The most common histologic grade was generally grade IV, corresponding to 50 % of cases. The analysis of the immune markers showed no signifcant correlation between EGFR expression and Ki-67 (r = -0.019, P = 0.89). Conclusions: Most studies show a strong relationship between the detection of EGFR and Ki-67 and its association with poor prognosis of patients. The presence of other possible mutations in these tumors not detected by immunohistochemistry merely our results.