RAF1 rearrangement was observed in ∼4.5% (3 out of 66) of PCa cases; PCA‐23 harbored RAF1 rearrangement, second case (PCA‐56) displayed 3' deletion and third case (PCA‐40) displayed 3' deletion in one tumor foci and RAF amplification and 5' deletion in another tumor foci (Fig. 4B, top panel). This evidence concerns the gene RAF1 and neoplasm.