EGFR and neoplasm: The pancreatic carcinoma cell markers (cytokeratins, CA 19-9) as well as the other overexpressed proteins identified in PaCa 5061 cell line (MUC 4, EGFR, CEACAM 1, -5, and -6) were analyzed by IHC in mouse primary tumor and corresponding metastasis and compared with the expression of this marker in the primary tumor of the patient.