I have been experiencing all or most of the symptoms of colon
/colorectal cancer, i.e. narrow stools, bloody mucus from the rectum on several occasions, localized abdominal pain (left flank and area just above the ilica crest), drastic change in bowel movements, significant weight loss (15 lbs in 2 months), loss of appetite, fatigue, etc. etc. etc. for the last 2 or 3 months. However: I am 21 years old, in farily good shape, and without a known family history of colon cancer.