The goal of this clinical trial is to evaluate the safety and efficacy of TOS-358 in women with HR+ HER2- metastatic breast cancer whose tumors have a mutation in PIK3CA and who meet all other study enrollment criteria. The main questions it aims to answer are:

1. Phase 1a: what is the maximum tolerated dose and recommended dose for phase 2?
2. Phase 1a: how safe and tolerable is TOS-358 at different dose levels when taken orally once or twice per day?
3. Phase 1b: how safe and effective is TOS-358 when given with standard of care medicines for HR+HER2- metastatic breast cancer (fulvestrant and CDK4/6i)

This is a study to establish a safe and feasible dose for prophylactic use of a combination of gabapentin and ketamine in head and neck cancer patients undergoing chemoradiation.

This study is exploring the use of Panitumumab in Head and Neck Cancer. Panitumumab is an approved drug named Vectibix and is used as an anti-cancer agent in other cancers such as colorectal cancer. It works by attaching to the cancer cell in a unique way that allows the drug to get into the cancer tissue. In addition to the Panitumumab, participants will also receive a Panitumumab-IRDye800 (Pan800) or a fluorescently labeled Panitumumab infusion. IRDye800 is an investigational dye that, when tested in the lab, helps various characteristics of human tissue show up better when using a special camera during surgery. Panitumumab-IRDye800 is a combination of the drug and the dye that attaches to cancer cells and appears to make them visible to the doctor when he or she uses the special camera during surgery.

The goal of this study is to use a novel and possibly safer approach to identify an optimal dose for panitumumab to treat cancer patients by using a new light-based therapy. In this study, different drug levels will be analyzed using this approach to understand how much drug reaches the tumor at different administered doses, which may help us provide safer and/or more effective therapies in the future.

The goal is to identify the correct amount or dose of a drug that is needed for effective cancer therapies. Often, clinical studies look at how much of the drug can be tolerated before patients become sick, rather than how much of the drug is required to be effective.

IRDye800 is an investigational dye that, when tested in the lab, helps various characteristics of human tissue show up better when using a special camera during surgery. Panitumumab-IRDye800 is a combination of the drug and the dye that attaches to cancer cells and appears to make them visible to the doctor when he or she uses the special camera during surgery. This will help the surgeon with clinical margins during surgery and will may have a clearer way to differentiate between cancer and healthy tissue.