Fig. 1

H& E staining and dual immunostaining findings; A, E Well differentiated SCC (× 100 magnification, 200 μm scale bar). C, G Poorly differentiated SCC (× 100 magnification, 200 µm scale bar). B Low co-expression of CD105 and OCT3/4 in well differentiated SCC; Positive red cytoplasmic immunostaining for CD105 and brown nuclear immunostaining for OCT3/4 in tumoral cells (× 400 magnification, 30 µm scale bar). D High co-expression of CD105 and OCT3/4 in poorly differentiated SCC; Positive red cytoplasmic immunostaining for CD105 and brown nuclear immunostaining for OCT3/4 in tumoral cells (× 400 magnification, 30 µm scale bar). F Low co-expression of GLUT1 and OCT3/4 in well differentiated SCC; Positive red cytoplasmic immunostaining for GLUT1 and brown nuclear immunostaining for OCT3/4 (× 400 magnification, 30 µm scale bar). H High co-expression of GLUT1 and OCT3/4 in poorly differentiated SCC; Positive red cytoplasmic immunostaining for GLUT1 and brown nuclear immunostaining for OCT3/4 (× 400 magnification, 30 µm scale bar)