My Dad as two days left of chemo and radiation treatments for Stage 3 esophageal cancer (T3 N1 M0) He is so tired, he can hardly keep his eyes open. I was wondering if anyone could tell me what type of test is done to see if the cancer has been taken care of by the treatments. And, when is that test preformed? He has been going for blood work every week since he started treatment and it has been good according to the doctors - but I am not sure if that test tells them anything about the actual cancer. If anyone could give me some info, I would appreciate it. Thanks