MYCN and neoplasm: In multivariable analysis, increment in every unit of UCHL1 mRNA correlated with a decrease in HR for OS (HR: 0.338, 95% CI: 0.116–0.980, P = 0.046) and EFS (HR: 0.476, 95% CI: 0.228–0.994, P = 0.048) independent of established risk markers (MYCN status, tumor stage and patient age at diagnosis; Table 4).