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

Figure 1

Staining of transverse colon biopsy. (a) H&E stain of transverse colon biopsy. Infiltrating poorly differentiated adenocarcinoma between normal colon glands. (b) H&E stain of biopsy from colon demonstrating poorly differentiated glandular structure. (c) Strong positive reaction for CK7 immunostaining. (d) Adenocarcinoma with positive reaction for TTF-1.

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