RecruitingClinical trialStereotactic Body Radiotherapy (SBRT) for Early Treatment of Oligometastatic Adenoid Cystic Carcinoma: The SOLAR TrialThe aim of this study is to learn whether the early initiation of a specialized and focused type of radiation called stereotactic body radiation therapy (SBRT) will impact the progression of advanced adenoid cystic carcinoma, quality of life, and overall survival. The name(s) of the study intervention involved in this study is: * Stereotactic Body Radiation Therapy (SBRT)