What is the treatment for hereditary colon cancer?

Depends. There are a number of inherited defects that may lead to colon cancer. In some cases, e.g. Apc, a prophylactic colectomy is advisable. In most cases the treatment is the same as for sporadic cancer.
Timming. This question will depend in many factors. I recommend seeing a professional and that way the answer is specific to your situation. www.drlugo.com.