Less than a month after Proactive Genomics launched its $300 prostate cancer genetic test, deCODE Diagnostics has caught up with its $500 deCODE PrCa test that analyzes eight SNPs. While deCODE is confident early detection is one way to, if not beat then, get a strong leg up on, prostate cancer, others are not sure it matters. "Screening," writes Hsien-Hsien Lei at Eye on DNA, "is controversial.