If colon cancer was present would something show up in routine blood work?

Depends. Some times colon cancer can cause anemia and abnormal liver functions but not sensitive and specific enough. Cea is used to moniter patients with a history of colon cancer but not to make a diagnosis.

Related Questions

What are the odds of a 18 year old with all normal blood work and no family history having colon cancer? Change in bm looser stool no other symptoms

Low. You are young, so risk is low, but young people could get it. With only symptoms of loose BM, I would first talks about irritable bowel, or change in diet. Depending on how long u had symptoms, and travel history- may be inflammatory disease or infections. But unlikely based on loose BM alone. Read more...
Colon cancer RARE. 90% of colon cancer is in people 50 and up. The average age of a patient with colon cancer is 72. The odds of an adolescent having colon cancer is 0.31 in 1 000 000. You should discuss your many concerns about colon cancer with your doctor. A simple stool test may help reassure you. Good luck. Read more...