Upper Gastrointestinal Bleed due to Duodenal Metastases of Lung Adenocarcinoma: Report of Two Cases and Review of Literature

Figure 5

Immunohistostaining of neoplastic lesion in the lung demonstrated a positive for CK-7 (a), negative for CK-20 (b), and positive for TTF-1 (c).

(a)

(b)

(c)