It makes sense to me that the scan could just be showing inflammation from the treatment at 8 weeks out. I don't know the answer to your question about why they did it so early--but they really are one of the best if not the best for care so I think you're in good hands.

SCC(T2N0M0) part.glossectomy & neck dissect 2/9/05 & 2/25/05.33 IMRT(66 Gy),2 Cisplatin ended 06/03/05.Stage I breast cancer treated 2/05-11/05.Surgery to remove esophageal stricture 07/06, still having dilatations to keep esophagus open.Dysphagia. "When you're going through hell, keep going"