A Study of Reduced Radiation Therapy and Standard-of-Care Chemotherapy in People With HPV-Positive Throat Cancer

Inclusion Criteria:

• Pathologically (histologically or cytologically) proven diagnosis of HPV associatedsquamous cell carcinoma of the oropharynx (tonsil, base of tongue, or oropharyngealwalls) from biopsy, surgical resection or excisional biopsy regardless of marginstatus.

1. Squamous cell carcinoma of the neck of unknown primary is allowed with excisionbiopsy of a lymph node (or core biopsy) or consent from the PI or co-PI

2. Patient must have excisional biopsy or core biopsy done in order to be onprotocol

• Subjects must have clinically or radiographically evident measurable gross diseaseat either the primary tumor site or nodal stations.

• Oropharyngeal Carcinoma (AJCC, 7th ed.) without evidence of distant metastasis basedon FDG PET/CT.

• CT or MRI of the neck with and without contrast Note: A CT scan of neck and/or aPET/CT performed for the purposes of radiation planning may serve as planning tools.

• ECOG Performance Status of 0-2 or KPS ≥ 50

• Age ≥ 18 Patients over 70yrs will be able to enroll in Cohort B only).

• Adequate hematologic function within 30 days prior to registration, defined asfollows:

1. White Blood Count (WBC) ≥ 2 K/mcL

2. Absolute neutrophil count (ANC) ≥ 1,000 cells/mm3

3. Platelets ≥ 100,000 cells/mm3

4. Hemoglobin ≥ 8.0 g/dl; Note: The use of transfusion or other intervention toachieve Hgb ≥ 8.0 g/dl is acceptable

• Adequate renal function within 30 days prior to registration, defined as follows:

1. Serum creatinine < 1.5 mg/dl or creatinine clearance (CC) ≥ 50 ml/mindetermined by 24-hour collection or estimated by Cockcroft-Gault formula: CCrmale = [(140 - age) x (wt in kg)] [(Serum Cr mg/dl) x (72)] CCr female = 0.85 x (CrCl male)

Note: Patients who cannot tolerate cisplatin or carboplatin/5FU based on clinical judgment will receive carboplatin and paclitaxel Paclitaxel can be substituted with Abraxane (Albumin-bound Paclitaxel).

• Adequate hepatic function within 30 days prior to registration, defined as follows:

1. Bilirubin < 2 mg/dl

2. AST or ALT < 3 x the upper limit of normal

Note: Exceptions can be made with PI and/or Co-Pi approval for patients to enroll on trial with a higher Bilirubin level such as Gilbert's Syndrome.

Note: Patients who cannot tolerate cisplatin or carboplatin/5FU based on clinical judgment will receive carboplatin and paclitaxel. Paclitaxel can be substituted with Abraxane (Albumin-bound Paclitaxel).

• Negative serum pregnancy test within 14 days prior to registration for women ofchildbearing potential

• The subject must provide study-specific informed consent prior to study entry

• Subject able to undergo MRI scans except for major medical contraindications likepresence of a pacemaker or approved by the PI or the CO-PI that the subject does notneed to undergo MRI scans

Exclusion Criteria:

• Subjects with prior head and neck radiation therapy

• Subjects with simultaneous primary cancers outside of the oropharynx a. Note: Exceptions can be made for patients with simultaneous primaries outside theoropharynx if determined by the PI/Co-PI the patient can proceed with protocolactivities.

• Prior invasive malignancy (except non-melanomatous skin cancer) unless disease freefor 3 years or if cure rate from treatment at 5 years to be 90% or greater

• Prior systemic chemotherapy for the study cancer; note that prior chemotherapy for adifferent cancer is allowable

• Severe, active co-morbidity defined as follows: (exceptions can be made if approvedby the PI and/or co-PI)

1. Unstable angina and/or congestive heart failure requiring hospitalizationwithin the last 6 months

2. Transmural myocardial infarction within the last 6 months

3. Acute bacterial or fungal infection requiring intravenous antibiotics at thetime of registration

4. Chronic Obstructive Pulmonary Disease exacerbation or other respiratory illnessrequiring hospitalization or precluding study therapy within 30 days ofregistration

5. Hepatic Insufficiency resulting in clinical jaundice and/or coagulation defects