The notion that EpoR was overexpressed in tumours and that rHuEpo enhanced tumour progression has been confounded by the finding that antibodies used to detect EpoR are nonspecific and additionally bind non-EpoR proteins, including HSP70 (Elliott et al, 2006; Brown et al, 2007; Della Ragione et al, 2007; Kirkeby et al, 2007; Laugsch et al, 2008; Ragione et al, 2007; Sturiale et al, 2007). Here, EPOR is linked to neoplasm.