Multispectral Optoacoustic Tomography in Head and Neck Squamous Cell Cancer

Inclusion Criteria: * Clinically confirmed node positive head and neck squamous cell cancer * Written informed consent signed and dated by the patient prior to the performance of the MSOT * At least 18 years-of-age at the time of signature of the informed consent form (ICF) * Patients planned for curative intent therapy * Patient available for the study duration * Patients of childbearing potential must have a negative pregnancy test prior to the study entry. * Patients of childbearing potential must use an effective form of contraceptive as per the protocol. Exclusion Criteria: * History of previous head and neck radiotherapy * Intent of treatment palliative * Women who are pregnant * Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety of efficacy assessment of the investigational regimen should be included. * Psychological, familial, sociological, or geographical conditions that do not permit compliance with the protocol and/or follow-up procedures outlined in the protocol.