MSR1 and Familial prostate cancer: As a consequence of these linkage studies, variants in prostate cancer families have been identified in several genes including Macrophage Scavenger Receptor 1(MSR1), 2′-5′-oligoadenylate-dependent ribonuclease L (RNASEL) and ELAC2 (chromosome 17p11/HPC2 region) (reviewed in Simard et al, 2003), but again none have been reliably associated with risk.