Annexin A2 Expression in Aerogenous Metastasis of Pulmonary Invasive Mucinous Adenocarcinoma: A Case Report including Immunohistochemical Analysis

Figure 3

Detachment of tumor cells in the primary site of left lung cancer. (a) Villous-shaped tumor cells project and separate into the alveolar space. H&E stain, ×100. (b) Immunopositivity on the cell-cell borders is weakened as tumor cells project or separate. Annexin A2 immunostain, ×400. (c) Tumor cells are negative, whereas the remaining alveolar epithelial cells are positive. TTF-1 immunostain, ×400.

(a)

(b)

(c)