Abnormal Stool: When to Consider a Colonoscopy - Surgery

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Abnormal stool?


Hello, doctor.
About three years ago, I had a colonoscopy, and the results were generally normal, except for a 0.5 cm hyperplastic polyp in the sigmoid colon, which was removed and found to be benign.
Additionally, I have a history of internal hemorrhoids.
Last year, I underwent a colonoscopy, but it only reached the transverse colon, and the results were normal with no abnormalities, although the internal hemorrhoids recurred.
Today, I noticed a small amount of mucus and blood at the end of my stool.
Could this be due to the internal hemorrhoids? The rest of the stool is normal in quantity and frequency, as I have a bowel movement every day.
I would like to know if I need to undergo another colonoscopy and how long I should wait before having one again.

Chen, 30~39 year old female. Ask Date: 2015/05/06

Dr. Ke Fangxu reply Surgery


It is generally recommended to undergo a colonoscopy every three to five years if there are no specific symptoms, or to have a fecal occult blood test every two years.
If the test is positive, a colonoscopy can be performed.
If there are still concerns, the National Health Insurance Administration does not impose restrictions on how often these procedures can be repeated, as long as the physician is willing to perform them.

Reply Date: 2015/05/06

More Info


When considering whether to undergo a colonoscopy, especially in the context of your history of polyps and internal hemorrhoids, there are several factors to take into account. Given that you have previously had a colonoscopy three years ago that revealed a benign polyp and a subsequent examination last year that only reached the transverse colon, it is important to evaluate your current symptoms and medical history.

The presence of mucus and blood streaks in your stool can indeed be attributed to your internal hemorrhoids, particularly if the blood is bright red and appears only on the surface of the stool. Hemorrhoids can cause discomfort and bleeding, especially during bowel movements, and this is a common symptom associated with them. However, it is crucial to differentiate between hemorrhoid-related bleeding and other potential causes, such as inflammatory bowel disease (IBD) or colorectal cancer, especially given your history of polyps.

In general, the American College of Gastroenterology recommends that individuals with a history of adenomatous polyps undergo surveillance colonoscopy at intervals based on the number, size, and pathology of the polyps. For instance, if you had a single small adenomatous polyp, the typical recommendation is to have a follow-up colonoscopy in five to ten years. However, if there are new symptoms, such as changes in bowel habits, unexplained weight loss, or the presence of blood in the stool, it may warrant an earlier examination.

Given your situation, here are some considerations:
1. Symptom Evaluation: If the blood and mucus are consistent and you notice changes in your bowel habits or experience abdominal pain, it would be prudent to consult your healthcare provider. They may recommend a colonoscopy to rule out any serious conditions.

2. Colonoscopy Timing: Since your last colonoscopy was last year and only reached the transverse colon, it may be advisable to schedule another colonoscopy sooner rather than later, especially if your symptoms persist. The exact timing can be determined based on your doctor's assessment of your symptoms and medical history.

3. Alternative Examinations: If you are hesitant about undergoing another colonoscopy, discuss with your physician the possibility of non-invasive tests such as a CT colonography (virtual colonoscopy) or stool tests for blood. However, keep in mind that these alternatives may not provide the same level of detail as a traditional colonoscopy, particularly if biopsies or polyp removals are needed.

4. Follow-Up with a Specialist: Given your history of polyps and the current symptoms, it might be beneficial to have a follow-up appointment with a gastroenterologist. They can provide tailored advice based on your specific situation and may recommend a more frequent surveillance schedule if deemed necessary.

In summary, while your symptoms could be related to your internal hemorrhoids, it is essential to remain vigilant and consult with your healthcare provider to determine the need for further investigation through a colonoscopy or other diagnostic methods. Regular monitoring and timely intervention are key to maintaining gastrointestinal health, especially in individuals with a history of polyps or other gastrointestinal issues.

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