HI there... okay I gather you are saying all along - other than a chest xray he has never had a scan? I'm not a dr. but I think that normally, a CT is used as a supporting dx tool. Then often just after treatment (normally 3-6 months) a scan is done to determine effectiveness of the treatment and to see if there are any suspicious areas that require watching or action. So I am going to go against the grain here and say he should have had at least two scans. Plus it is common practice to have a chest CT to check for lung mets. Most drs. don't like exposing their patients to too much radiation. So some will stop after the first clean scan.

A ct is also often used to plan radiation and surgery.

Hopefully he is being seen at a CCC. hugs