MKI67 and neoplasm: When checking the available charts before performing histological revision, the following data were reported in the histological reports referring to the initial diagnosis: tumor differentiation in 75 (74.2%) cases, specific immunohistochemical assessment by CgA and Syn in 38 (37.6%) and 32 (31.7%) cases, respectively, grading in 85 cases (81.2%), and Ki67 evaluation in 81 (80.2%) samples.