CEACAM5 and leiomyosarcoma: Immunohistochemically, leiomyosarcomas are nearly uniformly positive for smooth muscle actin, desmin, and vimentin and negative for calretinin, carcinoembryonic antigen, cytokeratin, leukocyte common antigen, neuroendocrine filament, CD-117, and S-100 protein [4,5].