What is carcinoid cancer and what will happen to someone found to have carcinoid during surgery for something else?

Carcinoid is a slow growing cancer. If it is all removed a person can be cured. However, there is always the risk of undetected microscopic cells remaining. These cells may show up after a number of years and would require chemotherapy or they could gradually kill a patient. The patient should be on periodic surveillance for at least 10 years. I recommend that you read the more comprehensive "Review of Carcinoid Disease" for a more in depth answer to this questions.