Various tumours, in particular the androgen-dependent tumours such as prostate, breast and ovarian cancers, produce CXCL12 and express CXCR4 (Zhou et al, 2001; Taichman et al, 2002; Sun et al, 2003; Kukreja et al, 2005). This evidence concerns the gene CXCL12 and ovarian carcinoma.