Colonic Metastases from Pleomorphic Carcinoma of the Lung Presenting as an Ileocecal Intussusception

Figure 3

Immunohistochemical staining of the tumor: (a) CK20 negative, (b) CK7 positive, (c) TTF-1 positive, (d) pancytokeratin (AE1/AE3) positive.

(a)

(b)

(c)

(d)