PTGS2 and Ehrlich tumor carcinoma: The analysis of the histological findings using immunohistochemical methods, both in the laparotomy scars and in the abdominal wall, allows us to conclude that, in mice with Ehrlich tumors, there was exacerbated inflammatory response, reflected by the increased expression of Cox-2, as well as greater fibroblast proliferation, reflected by the increased expression of FGF.