The low incidence of LOH in the region of the HPC1 locus in all prostate lesions studied suggests that this putative hereditary prostate cancer susceptibility locus does not appear to have a role in sporadic prostate cancer, at least not in the context of LOH. In contrast, analysis of the same tissues for LOH at chromosome 10q confirmed frequent alterations in this region linked to late stage prostate cancer. PTEN mutations in microdissected morphologically normal and BPH tissue showed alterations in nontumor tissue surrounding adenocarcinoma. Microsatellite instability was increased in adenocarcinomas over an elevated background recorded in surrounding tissues.
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