Disease Entity. 1  Consist of refractive, hyaline-like calcified nodules located within the optic nerve head. 2  Prevalence 0.4-3.7%. 3  Males = Females.  Whites 1  > Blacks. >85% bilateral, but asymmetric.  Familial â Autosomal dominant inheritance.
Severe bleeding from the colon may require surgery to remove the affected portion of the colon. Bowel obstruction. A blocked colon is an emergency that may require total or partial colectomy, depending on the situation. Colon cancer. Early-stage cancers may require only a small section of the colon to be removed during colectomy. Cancers at a later stage may require more of the colon to be removed. Crohn's disease. If medications aren't helping you, removing the affected part of your colon may offer temporary relief from signs and symptoms.
Colonoscopy may be done for the following reasons: 1  Abdominal pain, changes in bowel movements, or weight loss. 2  Abnormal changes (such as polyps) found on sigmoidoscopy or x-ray tests (CT scan or barium enema) 3  Anemia due to low iron (usually when no other cause has been found)  Blood in the stool, or black, tarry stools.