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Figure 2: H and E-stained specimen of the lung revealed poorly differentiated adenocarcinoma composed of pleomorphic neoplastic cells arranged in a micropapillary pattern within desmoplastic or fibrous stroma (a, 200×). The tumor cells of the lung were immunoreactive for CK7 (b), TTF-1 (c), and CA19-9 (d). The liver specimen also showed the same immunoprofiles (B1, C1, and D1)

Figure 2: H and E-stained specimen of the lung revealed poorly differentiated adenocarcinoma composed of pleomorphic neoplastic cells arranged in a micropapillary pattern within desmoplastic or fibrous stroma (a, 200×). The tumor cells of the lung were immunoreactive for CK7 (b), TTF-1 (c), and CA19-9 (d). The liver specimen also showed the same immunoprofiles (B1, C1, and D1)