MAOA and neoplasm: In a cohort of 65 patients (table S3) with confirmed biochemical relapse within 11 years after RPE, those with high (IRS > 10) MAO-A expression had a significantly shorter time-to-relapse (median 16.8 mo) than patients with low-intermediate (IRS ≤ 10) MAO-A expression (median 36.1 mo) (Fig. 5C), confirming the importance of elevated MAO-A expression for accelerated tumor progression.