The patient's routine blood count, blood chemistries, blood serum cortisol, tumor markers including chromogranin A, NSE, and relative 24 h urine tests such as 5-hydroxyindoleacetic acid, vanillylmandelic acid (VMA), noradrenaline, dopamine, homovanillic acid (HVA), metanephrine, and potassium and sodium were also within normal limits. This evidence concerns the gene ENO2 and neoplasm.