ITGAM and neoplasm: If the mRNA expression profile of the analyzed factors in TAS cells differs from that in peritoneal macrophages, a comparative analysis may allow identifying the type of cells in the tumor: either these are CD11b+Ly-6C+ myeloid cells of the tumor microenvironment, including tumor-associated macrophages, or these are CD11b+Ly-6C+ recruited macrophages.