Bevonescein to Highlight Nerves in Patients Undergoing Head & Neck Surgery

Inclusion Criteria: 1. A neoplasm located in the head and neck. 2. Primary surgical treatment is by parotidectomy, or thyroidectomy, or cervical neck dissection. 3. Can understand and is willing to sign a written informed consent document. 4. ≥18 years of age. 5. Life expectancy of at least 6 months. 6. Normal liver and kidney functions. 7. If of childbearing potential, must have a negative urine or serum pregnancy test and be using a medically acceptable form of contraception (e.g., hormonal birth control, intrauterine devices, double-barrier method) or abstinence. The subject, if male, must use a medically acceptable form of contraception (e.g. condom) or abstinence. 8. Plans to undergo head and neck surgery. Exclusion Criteria: 1. Prior radiation or chemotherapy for any prior head and neck neoplasm. 2. Open surgery in the ipsilateral head and neck within 1 year. 3. Abnormal cardiac rhythm not controlled with medication, history of stroke, coronary events and/or heart failure within 1 year. 4. Current evidence of renal disease. 5. Pregnant or breastfeeding. 6. Unresolved acute toxicity from prior anti-cancer therapy. 7. History of fluorescein allergy. 8. Any other criteria deemed by the Principal Investigator that may prevent the patient from successfully completing the trial.