Fig. 2

Tiam1 expression in tumor samples and non-cancerous tissue samples. Tiam1 protein staining mainly distributes in the cytoplasm. a (100×) and b (200×), strong staining of Tiam1 protein in tumor cells. c (100×) and d (200×), moderate staining in tumor cells. e (100×) and f (200×), weak staining in tumor cells. g (100×) and h (200×), no Tiam1 protein staining is present in the non-carcinoma epithelium