Nivolumab and Ipilimumab and Stereotactic Body Radiation Therapy in Treating Patients With Salivary Gland Cancers

Patients receive nivolumab intravenously (IV) over 30 minutes on day 1. Treatment repeats every 2 weeks for up to 12 courses and then every 4 weeks for additional 8 courses in the absence of disease progression or unacceptable toxicity. Patients also receive ipilimumab IV over 60 minutes on day 1. Treatment repeats every 6 weeks for up to 4 courses in the absence of disease progression or unacceptable toxicity. Beginning week 3, patients undergo 3 fractions of stereotactic body radiation therapy every other day in the absence of disease progression or unacceptable toxicity. After completion of study treatment patients are followed up at 30 days and then every 8 or 12 weeks.