Colonoscopy
Colonoscopy (/ˌkɒləˈnɒskəpi/) or coloscopy (/kəˈlɒskəpi/)[1] is the endoscopic test of the large bowel and parts the small bowel.
Tests use a CCD camera or a fiber optic camera on a flexible tube passed through the anus. It can provide a visual diagnosis and allow biopsy or removal of suspected colorectal cancer lesions.