Representative pictures of Cripto-1 expression evaluated by immunohistochemical staining in human NPC samples. (a) and (b) Positive expression of Cripto-1 in WHO type I and III NPC samples (Original magnification ×400). (c) and (d) Positive expression of Cripto-1 in WHO type II NPC samples (Original magnification, ×100 and ×400, respectively). (e) and (f) Negative Cripto-1 staining of residual gland and normal nasopharyngeal epithelial tissue (arrow: residual gland and normal epithelial cells; Original magnification, ×100).
Wu et al. BMC Cancer 2009 9:315 doi:10.1186/1471-2407-9-315