Fig. 4From: Sarcomatoid carcinoma presenting as cancers of unknown primary: a clinicopathological portraitRepresentative pathology sections of sarcomatoid carcinoma. Representative sections of sarcomatoid carcinoma from case 1 (a, H&E stain and b, pancytokeratin stain, 20x) and case 2 (c, H&E stain and d, pancytokeratin stain, 20x). The tumors show epithelioid and spindle cells with markedly pleomorphic nuclei and large nucleoli growing in sheets and exhibiting numerous mitoses. The tumors show partial staining for pancytokeratin immunohistochemistryBack to article page