Accuracy of grading pancreatic neuroendocrine neoplasms with Ki‐67 index in fine‐needle aspiration cellblock material

Objective The aim of this study was to assess the preoperative tumour grade of pancreatic neuroendocrine neoplasms (panNENs) by determining the Ki‐67 index in endoscopic ultrasound‐guided fine needle aspiration ( EUS ‐ FNA ) material and to correlate the preoperative tumour grade with the postoperative tumour grade in surgical specimens. Methods We performed a retrospective review of the institutional pathology database over a 10‐year period...