An early study indicated loss of heterozygosity of the BRCA1 loci and other loci on chromosome 17q in human prostate cancer (Gao et al., 1995), suggesting monoallelic loss of BECN1, which is located at 17q23.31 (Liang et al., 1999) (Table 2). This evidence concerns the gene BECN1 and prostate carcinoma.