Colonic Metastasis with Anemia Leading to a Diagnosis of Primary Lung Adenocarcinoma

Figure 2

Needle core biopsy of left upper lung lobe mass. (a), (b), and (c) H&E stain demonstrating infiltrating adenocarcinoma. (d) Immunohistochemistry positive reaction for TTF-1, consistent with primary lung malignancy and the metastatic lesion in the transverse colon.

(a)

(b)

(c)

(d)