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This phase IV trial evaluates how well giving standard of care (SOC) peptide receptor radionuclide therapy (PRRT) after SOC surgical removal of as much tumor as possible (debulking surgery) works in treating patients with grade 1 or 2, somatostatin receptor (SSTR) positive, gastroenteropancreatic neuroendocrine tumors (GEP-NETs) that have spread from where they first started (primary site) to the liver (hepatic metastasis). Lutetium Lu 177 dotatate is a radioactive drug that uses targeted radiation to kill tumor cells. Lutetium Lu 177 dotatate includes a radioactive form (an isotope) of the element called lutetium. This radioactive isotope (Lu-177) is attached to a molecule called dotatate. On the surface of GEP-NET tumor cells, a receptor called a somatostatin receptor binds to dotatate. When this binding occurs, the lutetium Lu 177 dotatate drug then enters somatostatin receptor-positive tumor cells, and radiation emitted by Lu-177 helps kill the cells. Giving lutetium Lu 177 dotatate after surgical debulking may better treat patients with grade 1/2 GEP-NETs.

The goal of this clinical trial is to test a new drug plus standard treatment compared with
standard treatment alone in patients with advanced head and neck squamous cell carcinoma and
cholangiocarcinoma.

The main questions it aims to answer are:

- is the new drug plus standard treatment safe and tolerable

- is the new drug plus standard treatment more effective than standard treatment

This is a Phase 2, open-label, parallel 3-cohort, multicenter study to evaluate the safety
and preliminary clinical activity of treatment combinations with and without chemotherapy in
participants with locally advanced unresectable or metastatic gastric, GEJ, and esophageal
adenocarcinoma. Chemotherapy will consist of FOLFOX (oxaliplatin, leucovorin, fluorouracil).

This study evaluates the patient reported outcomes in patients with digestive system neuroendocrine cancer and lung neuroendocrine cancer. Patients with neuroendocrine cancer usually have a high symptom burden which may have a negative effect on health-related quality of life (HRQoL). Patient questionnaires gather information describing symptoms and effect on quality of life, cancer type and any treatments received. Studying quality of life in patients receiving treatment for neuroendocrine cancers may help identify the effects of treatment and improve future treatment plans. Information gathered from this study may help researchers understand whether patient's diagnosis, symptoms, and order of cancer treatments have any effect on quality of life.

This phase II/III trial compares the effect of adding chemotherapy before and after surgery versus after surgery alone (usual treatment) in treating patients with stage II-III gallbladder cancer. Chemotherapy drugs, such as gemcitabine and cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving chemotherapy before surgery may make the tumor smaller; therefore, may reduce the extent of surgery. Additionally, it may make it easier for the surgeon to distinguish between normal and cancerous tissue. Giving chemotherapy after surgery may kill any remaining tumor cells. This study will determine whether giving chemotherapy before surgery increases the length of time before the cancer may return and whether it will increase a patients life span compared to the usual approach.