In the gonad module, we checked the genes in the enriched functional categories using DAVID online tools http://david.abcc.ncifcrf.gov/, and found that many genes (CLDN3, CLDN4, PTK2B, EPAS, CDH1, CDH2, TYMP, TGFA, WT1, CTGF, FN1 and ITGB3) related to cell adhesion or migration were associated to ovarian tumors. This evidence concerns the gene CLDN4 and ovarian neoplasm.