Study to Compare Irinotecan Combined With Cisplatin (IP) Versus Etoposide Combined With Cisplatin (EP) in Advanced and Metastatic Gastrointestinal Pancreatic and Esophageal Neuroendocrine Carcinoma

The study will be conducted to compare the safety and efficacy of irinotecan combined with cisplatin (IP regimen) and etoposide combined with cisplatin (EP regimen) in advanced or metastatic gastrointestinal pancreatic and esophageal neuroendocrine carcinoma. In this prospective randomized phase II study, the investigators aim to compare the survival benefit as well as the safety for irinotecan combined with cisplatin (IP regimen) versus etoposide combined with cisplatin (EP regimen) in advanced or metastatic gastrointestinal pancreatic and esophageal neuroendocrine carcinoma.