John618, I had multiple fine needle biopsies between various scans (Pet and CT) and everything came back suspicious but not conclusive. I finally had a sonogram-directed large needle biopsy and bingo, I won the prize, SCC of the lymph node with unknown primary. In a week and a half, I had a tonsilectomy and the primary site was found in my right tonsil. So if the fine needle biopsy doesn't work for you, you might try a sonogram-directed large needle biopsy to get enough tissue to properly test. Will pray for your results.