Serum TNKS2 levels were measured in patients with pituitary adenoma (n = 40) and reference (n = 40) groups, but no statistically significant difference was found (median (IQR): 0.426 (0.327) vs. 0.394 (0.455), p = 0.946). This evidence concerns the gene TNKS2 and pituitary gland adenoma.