We observed that mRNAs from recognized PCa‐associated genes (e.g., AR, KLK3, STEAP2, NKX3.1) were very high in the list of differentially upregulated macrophage genes isolated from cocultures relative to macrophage controls (Supplementary Data), suggesting significant phagocytosis of mRNA from PCa cells. The gene discussed is KLK3; the disease is posterior cortical atrophy.