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

Figure 5

Aerogenous metastasis of left lung cancer II. (a) Tumor cell aggregates adhere to the alveolar wall, and pseudoluminal gaps are seen inside the aggregates. H&E stain, ×400. (b) Cytoplasmic-positive products accumulate in the lateral sides, especially on the underside, forming membranous positivity. Annexin A2 immunostain, ×400. (c) Many alveolar epithelial cells disappear or are indistinct compared with those observed in Figure 4(d). TTF-1 immunostain, ×400.

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