Evaluating 111In Panitumumab for Nodal Staging in Head and Neck Cancer

PRIMARY OBJECTIVE: I. Assess the safety of indium In 111 panitumumab (111In-panitumumab) as a molecular imaging agent in patients with HNSCC. SECONDARY OBJECTIVE: I. Compare sensitivity and specificity of identifying sentinel lymph nodes by systemic injection of 111In-panitumumab prior to day of surgery versus conventional local injection with an optical dye at the time of surgery. EXPLORATORY OBJECTIVES: I. Determine if systemic injection of 111In-panitumumab can identify tumor-positive lymph nodes on preoperative SPECT/CT. II. When preoperative imaging information (eg, fludeoxyglucose F 18 \[18F-FDG\] positron emission tomography \[PET\]/CT and/or magnetic resonance imaging \[MRI\]) data is available: IIa. Evaluate the sensitivity, specificity, and negative predictive value of 111In-panitumumab SPECT/CT findings to the sensitivity, specificity, and negative predictive value of preoperative MRI in identifying metastatic lymph nodes (histopathological results will serve as the gold standard). IIb. Evaluate the sensitivity, specificity, and negative predictive value of 111In-panitumumab SPECT/CT findings to the sensitivity, specificity, and negative predictive value of preoperative 18F-FDG PET/CT in identifying metastatic lymph nodes (histopathological results will serve as the gold standard). OUTLINE: Patients receive loading dose of panitumumab intravenously (IV) over 15 minutes followed by 111In-panitumumab IV bolus on day 0. Patients then undergo SPECT/CT scan between day 1 and day of standard of care surgery (up to day 5). During standard of care surgery, patients receive local injection of optical dye per surgeon's preference and undergo intraoperative and near infrared (NIR) imaging. Patients additionally undergo blood sample collection during screening and electrocardiography (ECG) during screening, on day 0, and on day 15 if indicated. Patients are followed for up to 15 days after last dose of study medication.