Figure 3

HE staining of lung squamous cell carcinoma tumor tissue samples (Grade II (A) and Grade III (B) (original magnification ×200). Staining of variably differentiated squamous cell carcinoma (Grade II (C) and Grade III (D) with an anti-SIX1 (original magnification ×400). The normal adjacent lung tissue was labelled with yellow arrows or tumor with red arrows.