Colonoscopy - I goes for 2nd time today after my checmo session

Colonoscopy is the endoscopic examination of the large colon 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 may provide a visual
diagnosis (e.g. ulceration, polyps) and grants the opportunity for biopsy
or removal of suspected lesions. Virtual colonoscopy, which uses 2D and
3D imagery reconstructed from computed tomography (CT) scans or
from nuclear magnetic resonance (MR) scans, is also possible, as a totally
non-invasive medical test, although it is not standard and still under
investigation regarding its diagnostic abilities. Furthermore, virtual
colonoscopy does not allow for therapeutic maneuvers such as
polyp/tumor removal or biopsy nor visualization of lesions smaller than 5
millimeters. If a growth or polyp is detected using CT colonography, a
standard colonoscopy would still need to be performed. Colonoscopy can
remove polyps smaller than one millimeter. Once polyps are removed,
they can be studied with the aid of a microscope to determine if they are
precancerous or not. Colonoscopy is similar to but not the same as
sigmoidoscopy. The difference between colonoscopy and sigmoidoscopy
is related to which parts of the colon each can examine. Sigmoidoscopy
allows doctors to view only the final two feet of the colon, while colonoscopy allows an examination of the entire colon,
which measures four to five feet in length. Often a sigmoidoscopy is used as a screening procedure for a full colonoscopy. In
many instances a sigmoidoscopy is performed in conjunction with a fecal occult blood test (FOBT), which can detect the
formation of cancerous cells throughout the colon