(a)

(b)

(c)

(d)

Figure 3: Immunohistochemical staining of 8-OHdG antibodies in the representative tissue specimens (400x): CO group (a), MNU + s-NaCl group (b), C20W cancer group (c), and C20W benign group (d). DAB stained immunoreactive cells (dark brown, arrows); nuclear counterstaining was performed with Hematoxylin II and Bluing reagent. LP: laminar propria and MM: muscularis mucosae.