What volumes do you cover when delivering salvage radiation for a contralateral neck recurrence after upfront ipsilateral neck radiation for tonsillar cancer?

Levels 1b, 2, 3, 4, 5, and RP on the previously unirradiated neck.

I'm not sure on the routine clinical need of radiating contralateral IB, or V if it's an isolated neck recurrence - depends on if you would've electively treated that if the patient had not had surgery. II-IV I agree with.

If isolated neck recurrence, I'm not sure if ipsilateral RP would need it eith...