RESUMEN
OBJECTIVE: The role of Angiopoietin 2 (Ang 2), which is necessary for tumor growth, extension, and metastasis is not fully elucidated. The presented study aimed to investigate the relationship between Ang 2 staining intensity, expression rate in tumor tissue, and the stage of lung cancer. MATERIALS AND METHODS: Fifty cases of lung cancer (34 non-small and 16 small cell cases) were included in the study. Immunohistochemistry was done to evaluate Ang 2 staining intensity and expression rate in tumor and stromal cells of lung cancer tissue. RESULTS: Ang 2 was positive for 45 (90%) cases and negative for five (10%) cases (P = 0.04). There was a significant correlation between Ang 2 expression rate of expression and the histologic type of lung cancer (P = 0.033). Ang 2 expression rate in tumor cells of cancer tissues diagnosed with adenocarcinoma was low. There was a significant correlation between Ang 2 expression rate in stromal cells of cancer tissue and the type of lung cancer (P = 0.021). Stromal cell expression rate of Ang 2 in adenocarcinoma was found to be low. CONCLUSIONS: As a result, the relationship between lung cancer stage and Ang 2 was documented with this study and the expression rate was found to be lower in adenocarcinomas. By this analysis, we can suggest that angiopoietins may be used as an option for targeted treatment in lung cancer.