Hello Jasper....as a third timer this time inoperable....going through rough chemo.   I highly recommend following your ENT advise....get this possible cancer out!  Lymph node dissection is not that painful postop.  I had left side partial dissection and last year I had mini on right side.  To me that surg., minimal compared to tongue.....etc., and ease worry of recurrance.   Hope I helped and prayers your way.