<s>[INST] 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? [/INST] Hi, Thanks for writing in. Colon cancer is completely cured if diagnosed at an early time. Your father had stage 2 disease and this is an early stage. After embolectomy, checking CEA and then doing CT scan, or ultrasound scan regularly is recommended. This is because about 50 percent of patients with colon cancer can have recurrent disease with spread to liver. Chemotherapy will reduce the chance of recurrence and spread therefore your doctors had told him to take it. Please get regular follow up done and reconsider the decision of chemotherapy after discussing with your doctor. The chance of recurrence and spread to liver is 50 percent. Give him medicines for heart problem as required and follow up regularly with the cardiologist. Please do not worry. </s>