The mean minimum serum glucose level during hypoglycemic episodes was 2.25 ± 0.56 mmol/L, the median insulin level was 23.77 μIU/ml, and the mean C-peptide level was 3.38 ± 1.79 ng/mL (Table 1), and there was no association between these findings and tumor size. This evidence concerns the gene INS and neoplasm.