HOXB7 and ovarian carcinoma: In this study overexpression of 16 HOX genes in ovarian cancer cell lines were found, the most common being HOXB7, HOXA13 and HOXB13. Overexpression varied between cell lines but of these 16 genes, HOXA10, A13, B4, B7, B13 and C13 showed little or no expression in normal samples (Table 1).