Immunoperoxidase staining pattern

Result

Related malignancy

Pan-cytokeratin (epithelial stain)

+

Carcinoma

Epithelial membrane antigen (epithelial stain)

+

Carcinoma

Vimentin (mesenchymal stain)

+

Sarcoma

Leukocyte common antigen

-

Lymphoma

HMB-45

-

Melanoma

Smooth muscle actin

-

Leiomyoma, Leiomyocarcoma

Carcino-embriogenic antigen

-

GIS carcinoma