MKI67 and neoplasm: Previous studies have reported the risk factors for recurrence, namely, timing of NELM occurrence [20], pancreatic NENs [22], tumor differentiation [17], non‐functional tumors [21], lymph node metastasis [21, 22], a step‐up of Ki‐67 index in metastases compared to primary tumor [19]{Lv, 2019 no. 41} and microscopic positive surgical margins [13, 22].