No prior radiation therapy to the head and neck; prior radiation therapy to body sites other than the head and neck are permitted provided that the treating radiation oncologist determines that there is no overlap between the head and neck radiation plan and the prior radiation fields Participants who have had prior radiation therapy to the head and neck No active malignancy; participants that received curative treatment for a prior cancer are eligible provided there is no prior head and neck radiation and no prior chemotherapy or anti-EGF or anti-HER therapy as above Patients with prior radiation to the head and neck Prior history of radiation therapy to the head and neck Prior history of head and neck cancer Must not have received any of the following prior therapies or treatments: systemic therapy for the study cancer, radiation therapy to the head and neck region, or curative-intent surgery in the head and neck region Prior radiation to the head and neck Prior radiation to the head and neck region COHORT I: History of radiation to the head and neck area (defined as above the clavicles) greater than months previous Prior treatment for head and neck cancer Prior head and neck radiation Prior head and neck radiation, chemotherapy, or immunotherapy Prior radiation therapy to head and neck region that would overlap with intended radiation treatment for nasopharyngeal carcinoma Patients with histologically documented recurrent head and neck cancer, or second primary head and neck cancer, AND who have previously received radiation (at least Gy) for head and neck cancer Prior therapy for head and neck cancer is allowed, and the number of treatments is not limited; however, any systemic therapy should have been completed at least days prior to study enrollment; any radiation to the head and neck should have been completed at least days prior to study enrollment; palliative radiation outside of the\r\nhead and neck does not require a washout Prior radiation therapy to the head and neck region. No previous radiation or chemotherapy for a head and neck cancer Patients may have a history of prior head and neck malignancy, but must be able to tolerate full dose radiation and chemotherapy for the current head and neck cancer, as determined by the treating oncologist No prior chemotherapy for the current locally advanced SCCHN is allowed; prior radiation or chemotherapy for a previous head and neck cancer is allowed provided full dose cisplatin and radiation can be delivered to the patient in this clinical trial and provided the patient is in remission from the prior head and neck cancer, and can undergo full dose radiation and chemotherapy for the current primary head and neck cancer Prior head and neck radiation or prior chemotherapy for head and neck squamous cell carcinoma (HNSCC) Prior treatment with radiation to the head and neck Prior radiation therapy to the head and neck Prior radiation therapy to the head and neck Prior head and neck radiation or prior chemotherapy Patients with prior radiation to the head and neck Prior radiation to the head and neck Prior radiation therapy to the head and neck No prior systemic chemotherapy, systemic biologic/molecular targeted therapy or radiation treatment for head and neck cancer History of radiation to the head and neck (above the clavicles) Patients may not have received previous therapy for their head and neck SCC, including chemotherapy, radiation therapy, or surgery beyond biopsy Previous head and neck radiation therapy Prior history of radiation to the head and neck region Patients receiving any prior radiation therapy to the head or neck Prior head and neck radiation or chemotherapy Patients with head and neck cancer recurrence requiring surgery with no history of prior chemotherapy or radiation therapy are considered eligible Patients must not have had any prior chemotherapy or radiation therapy for head and neck cancer treatment Prior head and neck radiation or chemotherapy Any prior head or neck irradiation Prior radiation therapy to the head and neck region Any prior known radiation therapy in head and neck area Prior radiation to the head or neck with overlapping radiation fields No previous radiation or chemotherapy for a head and neck cancer No prior chemotherapy for the current locally advanced squamous cell carcinoma of the head and neck (SCCHN); prior radiation or chemotherapy for a previous head and neck cancer is allowed provided full dose radiation can be delivered to the current treatment and provided the patient remains in remission for greater than years from prior diagnosis Patients may have a history of prior malignancy, but must be able to tolerate full dose radiation and chemotherapy for the current head and neck cancer, as determined by the treating oncologist Previous head and neck radiation therapy involving the glottic larynx Prior therapy to the head and neck, with the intent to treat, the current diagnosis of head & neck cancer Subjects with prior head and neck radiation therapy Patients who had prior head and neck radiation therapy Prior radiation to the head and neck Patients may not have received previous therapy for their head and neck SCC, including chemotherapy, radiation therapy, or surgery beyond biopsy Patients with prior primary treatment for head and neck cancer (e.g. chemoradiation or radiation alone). Prior radiation to the head and neck. Received previous radiation treatment for head and neck cancer Patient is initiating radiation therapy (XRT) for head and neck cancer (HNC) Patients with head and neck cancer who plan to undergo radiation therapy to the head and neck region Patients with prior radiation therapy to the head and neck region or prior chemotherapy for head and neck cancer (induction chemotherapy not excluded) Subjects diagnosed with head and neck tumors (any histology) receiving ongoing chemoradiation or radiation therapy Patients actively receiving radiation to the head, neck, or gastrointestinal tract Patients who are eligible for chemoradiation therapy of the head and neck Patients who have previously been treated with surgery or radiation for head and neck cancer and/or are being treated for recurrent head and neck cancer Subjects with a diagnosis of head and neck cancer biopsy proven, and who are candidates for radiation therapy Prior head and neck radiation treatment Prior history of radiation therapy to the head and neck Prior history of head and neck cancer Prior head and neck radiation treatment Has had prior radiation to the head and neck Patients who are scheduled to undergo radiation or chemoradiation treatment for head/neck cancer Previous or concurrent radiation therapy to head, neck, and chest (i.e. application sites only) Patients who have had any previous head and neck surgery that has affected swallowing, voice or speech or who have had previous radiation to the head or neck Previous or concurrent radiation treatment to the head and neck region Prior head and neck RT Prior radiation to the head and neck Patients with previous head and neck (H&N) radiation Must have a diagnosis of head/neck cancer Subject has received prior radiation to the head and neck region (+/- chemotherapy). diagnosis of head and neck cancer Within two weeks of starting or one week from having started, radiation therapy +/- chemotherapy for head and neck cancer History of prior surgery or radiation to the head, neck, upper limb, or trunk Any prior radiotherapy to the head and neck region Patient must not have a history of radiation to the neck Patients with history of prior radiation therapy or radioactive iodine to the head and neck Diagnosed Head and Neck Cancer patients with planned Radiation therapy