The presence of Hsp70 on the plasma membrane of tumor cells was determined by global profiling of membrane proteins (Shin et al. 2003) and flow cytometry using cmHsp70.1 monoclonal antibody (Stangl et al. 2011; Multhoff et al. 1995) that specifically detects a conformational epitope of Hsp70 in the context with lipids. Here, HSPA1A is linked to neoplasm.