Analysis of the correlation between RXRα expression and histopathological parameters revealed: median IRS in serous specimens was 2 (SD ± 0.147) compared to a median IRS of 3.5 in mucinous carcinomas (SD ± 0.499; p = 0.424; Table 4; Fig. 1E–G). This evidence concerns the gene RXRA and mucinous adenocarcinoma.