[koh-luh-NAHS-kuh-pee] An examination of the inside of the colon using a thin, lighted tube, called a colonoscope, inserted into the rectum. Samples of tissues may be collected for examination under a microscope.
Colonoscopy is a procedure whereby a doctor inserts a viewing tube (colonoscope) into the rectum for the purpose of inspecting the colon. Upon detecting certain abnormal areas of the colon a biopsy can be performed.
Colonoscopy or coloscopy is the endoscopic examination of the large bowel and the distal part of the small bowel with a CCD camera or a fiber optic camera on a flexible tube passed through the anus. It can provide a visual diagnosis (e.g. ulceration, polyps) and grants the opportunity for biopsy or removal of suspected colorectal cancer lesions.