The variables that were independently associated with recurrence (in the multivariant analysis) were the presence of SDHB pathogenic variant (HR 13.3, 95% CI 4.20-41.92), higher levels of urinary normetanephrine (HR 1.02 per each increase in standard deviation, 95% CI 1.01-1.03) and a larger tumor size (HR 1.01 per each increase in mm, 95% CI 1.00-1.02). Here, SDHB is linked to neoplasm.