941954.fig.001a
(a)
941954.fig.001b
(b)
941954.fig.001c
(c)
Figure 1: EGFR expression at immunohistochemistry (400X). In (a), a case of adenocarcinoma with negative EGFR. In (b) and (c), 2 different cases of adenocarcinoma with positive EGFR (brown staining).