To examine whether FRAT1 expression is correlated with increased expression and cytoplasmic/nuclear localisation of β-catenin in primary ovarian serous adenocarcinoma tissues, we compare the expression of FRAT1 and the subcellular localisation of β-catenin in 41 primary human ovarian serous adenocarcinoma tissues by in situ hybridisation and immunohistochemical staining, respectively. This evidence concerns the gene FRAT1 and ovarian serous adenocarcinoma.