Pancreatic adenocarcinosarcoma of monoclonal origin: A case report

Figure 4 Immunohistopathology of the pancreatic tumor. A: A pancreatic biopsy revealed a sarcomatoid component (right) containing mesenchymal tumor cells and a carcinomatous component that gave rise to tumor glands (left) [pan-cytokeratin (CK) staining, × 40]; B: The sarcomatoid component from the liver was also positive for pan-CK (× 400); C: In the pancreatic biopsy, the sarcomatous component stained positive for vimentin (right) while the adenomatous component was negative for vimentin (left) (× 40); D: The sarcomatoid component from the liver stained positive for vimentin (× 400).