MKI67 and neoplasm: If only the BP-NEN were considered, no correlation between the IRS values of FAM159B and the presence of lymph node metastases was seen, although the positive correlation between FAM159B expression with tumour grade (rsp = 0.139; p = 0.004) and Ki-67 index (rsp = 0.218; p < 0.001) persisted.