This study is for patients who have had surgery for pancreatic neuroendocrine tumor (pNET). This study is being done to find out if giving chemotherapy after surgery is better or worse than the usual approach for patients that have had surgery for pNET.
This study is for patients with gallbladder cancer. The purpose of this study is to compare the usual treatment (surgery plus chemotherapy after) to using chemotherapy both before and after surgery.
This study is for patients with pancreatic cancer. The purpose is to see if researchers can increase the chance of pancreatic cancer staying away by giving them chemotherapy before and after surger