This is Dr. David
there are stool DNA special tests such as Cologuard which detects colon cancer DNA and occult blood in the stool to give an idea if there is colon cancer.
it is not quite as accurate as colonoscopy, but still pretty good.
his gall stones which can be sporatic could be causing his abdominal pains.
gall stones can be hard to predict for and can be sporatic when they cause pain, usually in the upper right side of the abdomen.
an ultasound of the gall bladder can look for these stones.
if he does have stones, there are medications like ursodiol which over time can help dissolve gall stones.
let me know if you have other questions.
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