Considering the surgical margins used in TORS, is it necessary to cover the entire tongue base with an elective dose in IMRT of cT1-3 HPV+ squamous cell carcinoma grossly involving one side of the base of tongue?   

Frankly, I see no point in doing TORS if a patient is likely to require postop RT unless you believe that you can safely treat neck only (which includes unavoidably part of the ipsilateral oropharynx to irradiate the RP nodes). And I do not (but have been wrong before). Particularly HPV positive no...

I usually do, and treat both sides of the neck.

I do not electively include the entire tongue base in Post-TORS RT planning. I use contrast enhanced simulation CT with a narrow field of view (for better tissue delineation) to outline the surgical bed. Having said that, it is not always easy to delineate surgical bed with 100% conviction. In those...

Thank you for your responses so far. I would like to disclose that I asked the question. Practice certainly varies on expansions (i.e. GTVp->CTVp->PTV, just GTVp->PTV, intermediate dose expansion [sometimes called PTVp2], no intermediate dose, etc). If I may clarify my question: During de...