The results of these two studies provided some fundamental data about intratumor heterogeneity of CCRCC: only a small fraction of genetic alterations display a clonal distribution, such as VHL loss and chromosome arm 3p loss, whereas other genes recurrently mutated such as SETD2 and BAP1 have a subclonal pattern of distribution within the tumor [176,177]. This evidence concerns the gene BAP1 and neoplasm.