Microphotographs of IHC are shown (×400). Ductal breast carcinoma sections at stages (A) I, (B) II, (C) III and (D) IV incubated with C14 anti-Lewis y MAb. A mainly non-apical cytoplasmic positive reaction is shown in all samples. (E) A benign and (F) a normal breast samples with an apical and linear pattern are shown. (G) A normal sample which did not react with C14 is depicted.