Phase III Open Label Study of MEDI 4736 With/Without Tremelimumab Versus Standard of Care (SOC) in Recurrent/Metastatic Head and Neck Cancer

Inclusion Criteria:

1. Age ≥18 years at the time of screening
2. Documented evidence of recurrent or metastatic SCCHN (oral cavity, oropharynx, hypopharynx, or larynx).
3. A fresh tumor biopsy for the purpose of screening or an available archival tumor sample. Tumor lesions used for fresh biopsies should not be the same lesions used as RECIST target lesions, unless there are no other lesions suitable for biopsy.
4. No prior systemic chemotherapy for recurrent or metastatic disease
5. World Health Organization (WHO)/Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 at enrollment
6. No prior exposure to immune-mediated therapy,

Exclusion Criteria:

1. Histologically or cytologically confirmed head and neck cancer of any other primary anatomic location in the head and neck not specified in the inclusion criteria including patients with SCCHN of unknown primary or non-squamous histologies (eg, nasopharynx or salivary gland)
2. Tumor progression or recurrence within 6 months of last dose of platinum therapy in the primary treatment setting
3. Receipt of any radiotherapy or hormonal therapy for cancer treatment within 30 days prior to first dose of study treatment
4. Active or prior documented autoimmune or inflammatory disorders (including inflammatory bowel disease \[eg, colitis, Crohn's disease\], diverticulitis