What volume would you cover for HPV-positive SCC of level IB node with ECE?

Depending on the subsite and stage of the primary tumor and nodal stage, we may treat ipsilateral IB, II-IV and contralateral II-IV. We may need to cover IV if there is more extensive nodal involvement in the neck. But if we focus the question narrowly on IB node with met HPV(+) tumor with ENE, for ...