TUBB3 and adenocarcinoma: Our results showed no significant difference in the protein and mRNA expression of BRCA1 (p=0.546 and p=0.701), STMN1 (p=0.449 and p=0.772), MAPT (p=0.954 and p=0.183) and TUBB3 (p=0.785 and p=0.163) between squamous cell carcinoma and adenocarcinoma (Figure 2C).