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). The gene discussed is RAF1; the disease is posterior cortical atrophy.