Resection of oropharyngeal tumor by transoral surgery using frozen section margin analysis resulting in a negative margin resection

No extensive perineural invasion after review by head and neck pathologist

No lymphovascular invasion after review by head and neck pathologist

Pathologic stage T1-2 N1-3 M0 disease

A Study of Mucosal Sparing Proton Beam Therapy (PBT) in Resected Oropharyngeal Tumors