Is stage N2a alone an indication for PORT in oropharyngeal squamous cell carcinoma with no other adverse features?  

The short answer is yes, based on it falling in a list of indications for post-op xrt, which includes lymph node size > 3cm.  Further, if this were an oral cavity tumor, some would argue that any node positive patient should be treated adjuvantly (ie even N1, though interestingly many oral c...