Generation of Organoids of Neuroendocrine Neoplasms of the Gastro-Entero-Pancreatic Tract Obtained From Patients Undergoing Surgery

This study is collecting tumor tissue from patients having surgery for neuroendocrine tumors of the digestive system (stomach, intestine, or pancreas) to grow miniature tumor models in the lab called "organoids," which can help researchers test treatments. **You may be eligible if...** - You are over 18 years old - You have been diagnosed with a neuroendocrine tumor of the digestive system (confirmed by biopsy or a special PET scan) - You are having surgery and enough tissue will be available for lab research - You are willing to sign informed consent **You may NOT be eligible if...** - You have previously received chemotherapy Talk to your doctor to see if this trial is right for you.