RecruitingPhase 2Radiation therapyA Study of Radiation Therapy After Surgery in People With Oral Tongue Squamous Cell CarcinomaThis study will test whether limiting standard photon intensity modulated radiation therapy (IMRT) to exclude the oral tongue surgical site can decrease the risk of side effects caused by oral radiation. The researchers will also find out if this approach affects the rate of disease coming back after treatment (recurrence), and will measure participants' quality of life by having them complete questionnaires.