I completed my treatment 11/22 and also have a lymph node that has gone from the size of a golf ball to barely noticeable now. I too was concerned and my RO also said it would continue to get smaller over the next few months. Pet scan planned 12 weeks post Tx. I guess we just have to wait and see.

Age 54 at DX 06/20/13 Left Neck Mass 07/11/13 DX SCC OC T0N2bM0 Stg IVa p16 neg. 08/09/13 Tonsilectomy and Adnoidectomy, Panendoscopy. Unknown Primary. Begin RAD 09/30/13 Cisplatin 10/01&22/13 PICC 10/21/13. PEG 10/25/13 to 1/24/14. Erbitux x 3. End 35 RAD 11/22/13 Clear PET 02/25/14