For hemorrhoid surgery, routine tests include preoperative blood work, blood type, urinalysis, and clotting time, and in older cases, cardiac and cardiac ultrasound and other related ancillary tests. However, before surgery, every patient with hemorrhoids needs a colonoscopy or anoscopy to make a clear diagnosis before surgery can be performed. Some patients with simple hemorrhoids may also have a combination of rectal polyps, adenomas or the possibility of colon cancer. It is especially important for patients undergoing hemorrhoid surgery to make sure that the diagnosis is completely confirmed under the scope and that other causes or etiologies are ruled out before the hemorrhoid surgery can be performed.