Haven't checked back for a while. The cancer did come back positive for HPV. What is ND?

Diagnosed 9-30-08,Stage 4a scc, T2,N2b,M0 base of tongue, 2 lymph node tumors, 46 yo male. 4 tx Cisplatin, 35 tx IMRT 70gy total. Treatment ended 1-6-08