Hi and welcome to Healthcaremagic. .I understand your concerns and I will try to help you as much as I can.
Yes there are other ways, but
colonoscopy is the most reliable option to accurately rule out tumors and other colon pathology. So he can do occult
stool test to see if blood is present in stool. Irigography is possible test which is based on contrast and xrays and it may show some bigger tumors.
However, causes ofcauses of
abdominal pain and bleeding through rectum are benign and include hemorrhoids,
anal fissure or rectal polyps. These are primarily treated with
stool softener, diet and sitzbaths. If there is no improvement in next few weeks, then surgical management should be considered.
Other causes may be more serious and include tumors or inflammatory bowel diseases. If hes has never done colonoscpy and is aged +55 then colonoscopy is definitely recommended and sooner or later sould be done.
I hope I have answered you query. If you have any further questions you can contact us in every time.
Kindly regards. Wish you a good health.