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

Table 1

Immunohistochemical analysis of the cecal tumor.

Antigen	Result
Pancytokeratin (AE1/AE3)	Tumor 4+
Cytokeratin 7 (CK7)	Tumor 4+
Cytokeratin 20 (CK20)	Tumor negative
CDX2	Tumor negative
Thyroid transcription factor-1 (TTF-1)	Tumor 4+
Vimentin	Tumor positive
Melanocyte antigen (Melan-A)	Tumor negative
Human melanoma black (HMB-45)	Tumor negative
S100	Tumor negative
Pan-melanoma	Tumor negative
Cluster of differentiation 117 (CD117) (c-Kit)	Tumor negative
Desmin	Tumor negative,; myofibroblasts positive
Smooth muscle actin (SMA)	Negative
Cluster of differentiation 31 (CD31)	Tumor negative
Cluster of differentiation 34 (CD34)	Tumor negative
Cluster of differentiation 45 (CD45), leukocyte common antigen (LCA)	Tumor negative,; entrapped reactive; lymphocytes positive