A 37-year old man with Pca...After the disease progressed while the patient underwent taxane-based chemotherapy, we performed a genetic test by FoundationONE CDx...Genetic testing revealed a frameshift mutation with a stop codon two positions further in the BRCA2 (pA902fs*2)...Thus, we administered cisplatin, the only platinum drug approved to treat PCa...Thereafter, the PSA continued to decrease...This case suggests potential predictive role of BRCA2 mutation for cisplatin in patients with mCRPC.