My father has diagnosed with stage 2b colon cancer (T3n0m0), hemicolectomy had been done in themonth May 14, & The doctor s suggestion on chemo was intermediate, (if the body survives go for it), We have nt taken any chemo yet.. As doctor suggests, we have been started checking CEA every 3 month..The result is very good & it was below the par. Dad is getting pain(fraction of a minutes) intermittently after the operation, hence we have gone through the Ultasound scan & fortunately no further issues & everything was perfectly all ryt.. Doctor also asked us to take a CT scan after completion of 1 yr (on May 15).. WE are all happy with the result post operation, and he is leading healthy life now (he also had an heart attack on may 2011 & have done a angioplasty). Could you please tel me that is there any chance of nonoccurrence? & how often does colon cancer recur?