What anatomical sites would you electively cover to intermediate dose for an oropharyngeal primary with clear extension into the nasopharynx?

I have had a case like this and I have to admit, I was not sure what the right thing to do was. How extensive is the NP disease component? Is there perineural spread on MRI? Hpv status?

Ultimately, my patient was a light smoker with hpv related disease. I decided to treat more like an oropharynx an...