Table 5 further underscores the distinction in Ki-67 distribution, with NET G3 cases predominantly exhibiting Ki-67 < 55% (18 vs. 2 in NEC) and NEC cases showing Ki-67 > 55% (14 vs. 7 in NET G3), yielding a robust statistical association (p < 0.001). This evidence concerns the gene MKI67 and neuroendocrine carcinoma.