Although this indicates that gdf9 is a potential tumour suppressor in CCRCC which can be used a potential target for tumour drug development, very few studies have looked at drugs which target the gene for therapeutic reasons nor have they indicated the relative level of gdf9 expression (Hanavadi et al., 2007; Du et al., 2012; Du et al., 2014). Here, GDF9 is linked to neoplasm.