Bowel Issues: Can Stool Tests Detect Colon Polyps? - Gastroenterology and Hepatology

Bowel issues

Hello Doctor, regarding the question I asked yesterday, the doctor's suggestion was to check for fecal occult blood.
Can this fecal occult blood test also detect the presence of colorectal polyps? As a follow-up to yesterday's question, I would like to add that in addition to having difficulty with bowel movements and experiencing thinner stools, I also feel like I haven't completely emptied my bowels after a bowel movement.
When I sit down, I have a constant sensation of pressure in my rectum, as if there is something there, and I also experience a very uncomfortable feeling (not related to odor).
Additionally, my abdomen feels very bloated, and I frequently pass gas.
Doctor, could you please tell me what might be wrong with me? Is this considered serious? Thank you.

ds2007wwe, 30~39 year old female. Ask Date: 2021/03/06

Dr. Chen Shidian reply Gastroenterology and Hepatology

It is often a functional disorder or hyperactivity syndrome; a stool examination can be performed first to rule out intestinal lesions.

Reply Date: 2021/03/06

More Info

Stool tests, particularly fecal occult blood tests (FOBT), are commonly used as a screening tool for colorectal cancer, but they have limitations when it comes to detecting colon polyps. While these tests can indicate the presence of blood in the stool, which may suggest the presence of polyps or other abnormalities, they do not directly identify polyps themselves. Polyps can be present without causing any bleeding, and thus a negative stool test does not rule out their existence.

In your case, the symptoms you describe—difficulty with bowel movements, a sensation of incomplete evacuation, abdominal bloating, and excessive gas—could be indicative of several gastrointestinal issues, including functional bowel disorders like irritable bowel syndrome (IBS), which is characterized by a combination of abdominal pain and altered bowel habits. The sensation of having something in the rectum could also be related to rectal issues, such as hemorrhoids or anal fissures, which can cause discomfort and a feeling of fullness.

Given your family history of colorectal cancer and the symptoms you are experiencing, it is prudent to discuss further diagnostic options with your healthcare provider. While stool tests are a good starting point, they are not definitive. If your stool test is positive for occult blood, it is generally recommended to follow up with a colonoscopy. This procedure allows for direct visualization of the colon and the opportunity to remove any polyps that may be present.

Regarding the severity of your symptoms, while they may not necessarily indicate a serious condition, they should not be ignored. Persistent changes in bowel habits, especially when accompanied by discomfort, warrant further investigation. It is essential to rule out any underlying conditions that may require treatment.

In summary, while stool tests can provide valuable information, they are not a substitute for more invasive procedures like colonoscopy when there are concerning symptoms or a family history of colorectal cancer. It is advisable to have an open discussion with your healthcare provider about your symptoms, the results of your stool test, and the potential need for further evaluation through a colonoscopy or other imaging studies. Early detection and intervention are key in managing bowel health and preventing more serious conditions.

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