LY6K was found to be a molecular marker for non-small-cell lung carcinoma (Ishikawa et al., 2007), head-and-neck squamous cell carcinoma (de Nooij-van Dalen et al., 2003), breast cancer (Kong et al., 2012), bladder cancer (Matsuda et al., 2011), and esophageal squamous cell carcinoma (Zhang et al., 2012). The gene discussed is LY6K; the disease is urinary bladder carcinoma.