BMPR2 and ovarian cancer: The BMP-2 receptors BMPRIA, BMPRIB, and BMPRII were also expressed in all three types of tissue, and the expression levels of BMPRIB and BMPRII in ovarian cancer tissue was significantly lower than those in benign ovarian tumors and normal ovarian tissue, although the difference in the BMPRIA expression level between the different tissues was not significant.