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Doctor insights on: How Far Into Colon Does Sigmoidoscopy Go

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I have a severely redundant colon that is also permantly distended by gas, why can stool slowly get through but the gas does not, it goes backwards?

I have a severely redundant colon that is also permantly distended by gas, why can stool slowly get through but the gas does not, it goes backwards?

Different processes: Passage of gas is more mechanical process than passage of stool that requires active peristalsis in your colon to pass BM. If you haven't done it, you should have a GI consult for an endoscopic exam for proper diagnosis and management. Use OTC meds for gas and diet modification (avoid beans, cauliflower) in the meantime. ...Read more

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Dr. John Lappas
532 doctors shared insights

Sigmoidoscopy (Definition)

Sigmoidoscopy is the use of a flexible fiberoptic camera or specially designed scope to examine the inside of the colon. Because the procedure only examines the left side of the colon (in an area called the sigmoid), it is termed sigmoidoscopy. This is to differentiate it from a colonoscopy, where the entire right and left side of the colon is examined. A sigmoidoscopy ...Read more


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What is the process of sigmoidoscopy with the colon?

What is the process of sigmoidoscopy with the colon?

Sigmoidoscopy exam: The sigmoid colon is the last bend of the gut before food reaches the rectum. Accordingly, examination of the sigmoid & left colon (hence the name "sigmoidoscopy") involves a flexible tube inserted into the rectum (often under sedation if you wish). The procedure takes only a few minutes & typically requires only a limited preparation. On the other hand, "colonscopy" examines the whole colon. ...Read more

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Can many months of cdif & tx make your colon more likely to perforate from colonoscopy or sigmoidoscopy after its cured (test ok & no sx)?

Can many months of cdif & tx make your colon more likely to perforate from colonoscopy or sigmoidoscopy after its cured (test ok & no sx)?

Depends : An inflamed colon is at higher risk of complications during colonoscopy as it tends to be thicker, more blood flow, and less flexible. If your colon has recovered from for C difficle colitis then your risk is back to normal. If you have been chronically ill and you are malnourished as a result you will have a slightly increased risk as well as a decreased ability to recover from a complication. ...Read more

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If a sigmoidoscopy scope shown no polyps or cancer in the area tested, does that mean there's no cancer throughout all of the colon?

Not really: Sigmoidoscopy looks at the sigmoid colon. However there is still that possibility that there may be something in the say cecum for which colonoscopy is a good way to check out that region ...Read more

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Do colon cancers usually continue to bleed? Can they bleed then nothing for 2.5 years? No symptoms, negative sigmoidoscopy.

Do colon cancers usually continue to bleed? Can they bleed then nothing for 2.5 years? No symptoms, negative sigmoidoscopy.

It does not fit the : Colon cancers can bleed but they do not regress and go away...They continue to grow and obstruct the large intestine and also spread to the liver within one or two years, if left untreated. Colonoscopy is a better way to locate them as sigmoidoscopy only reaches the lower part of the colon. ...Read more

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Does fresh blood mixed with stool come from higher than the sigmoid colon? From what I understand a sigmoidoscopy is a pointless test.?

Does fresh blood mixed with stool come from higher than the sigmoid colon? From what I understand a sigmoidoscopy is a pointless test.?

Usually lower.: Bright red blood mixed with an otherwise normal stool usually suggests a lower tract source - hemorrhoid, anal fissure, rectal polyp or cancer. These can be readily observed with just a physical examination and sigmoidoscopy. Not look at the whole colon, a colonoscopy is necessary, a point to which I think you're alluding. ...Read more

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Ct scan shows diverticulitis Gi advised sigmoidoscopy to check narrowing of colon could it be cancer as been told only scoping can confirm difference?

Ct scan shows diverticulitis Gi advised sigmoidoscopy to check narrowing of colon could it be cancer as been told only scoping can confirm difference?

Unfortunately those: two conditions can look similar on the CT scan. Another option is to treat for diverticulitis, then repeat the CT scan to see if the abnormality has resolved. If you don't have symptoms of diverticulitis, you should have the sigmoidoscopy. ...Read more

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Dr. Kristi Moffat
125 doctors shared insights

Proctosigmoidoscopy (Definition)

Proctosigmoidoscopy is an examination of the rectum and sigmoid colon (just above the rectum) using a narrow, rigid scope with a built-in light. A small amount of air is usually introduced to distend the bowel, allowing for a better view. Generally, a limited prep is helpful, but not always necessary. ...Read more


Dr. Oscar Novick
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Colon (Definition)

The colon is another term for the large intestine. This is the final portion of the digestive system, responsible for absorbing water and storing stool before evacuation. It is divided into sections described as cecum; ascending, transverse, descending and ...Read more