Can Hemorrhoids Affect Fecal Occult Blood Testing Results?

Q: Can Hemorrhoids Affect Fecal Occult Blood Testing Results?

Hello： Fecal occult blood sampling has specific methods to minimize the impact of hemorrhoidal bleeding. <br>By following the sampling instructions, one can reduce the likelihood of false positives due to hemorrhoidal bleeding. <br>As for irritable bowel syndrome, it should not h

Hemorrhoids can affect fecal occult blood screening?

1.
If the mother has colorectal cancer, is there a high possibility of hereditary risk despite no family history? I would like to start with a fecal occult blood test!
2.
However, I have irritable bowel syndrome, and usually after my first meal, I experience mild abdominal pain and have a bowel movement that is loose and unformed, and I only go once a day! After that, my stomach feels better!
3.
Additionally, I have internal hemorrhoids, and although I have had experiences of passing bright red blood after bowel movements on two different occasions, it has been a long time since I last saw blood! The question is: with mild irritable bowel syndrome and no bleeding from the internal hemorrhoids, can I still perform a fecal occult blood test? Is there a risk of false positives? Furthermore, considering that there is no family history of colorectal cancer and the hereditary risk is very low, and being only 32 years old, is it okay not to do the fecal occult blood test? I am quite concerned about this! Thank you!

Rulao, 30~39 year old female. Ask Date: 2013/05/22

Dr. Chen Qifeng reply Gastroenterology and Hepatology

Hello: Fecal occult blood sampling has specific methods to minimize the impact of hemorrhoidal bleeding.
By following the sampling instructions, one can reduce the likelihood of false positives due to hemorrhoidal bleeding.
As for irritable bowel syndrome, it should not have a significant effect.
Currently, fecal occult blood screening for colorectal cancer targets individuals aged 50 and older, which is naturally aimed at the general population.
However, individual cases may be managed appropriately by physicians based on clinical conditions.
Wishing you health, Dr.
Chi-Feng Chen, Taoyuan Hospital, Department of Health.

Reply Date: 2013/05/22

More Info

Fecal occult blood testing (FOBT) is a common screening tool used to detect hidden blood in the stool, which can be an indicator of various gastrointestinal issues, including colorectal cancer. Your concerns regarding the impact of hemorrhoids and other gastrointestinal conditions on FOBT results are valid and warrant a detailed discussion.

1. Impact of Hemorrhoids on FOBT Results: Hemorrhoids can indeed affect the results of a fecal occult blood test. If there is active bleeding from hemorrhoids, it can lead to a false-positive result, indicating the presence of blood in the stool when the source is not from the gastrointestinal tract itself. However, if you have not experienced bleeding from your hemorrhoids recently, the likelihood of a false-positive result decreases. It is essential to inform your healthcare provider about your history of hemorrhoids and any recent bleeding episodes when undergoing the test.

2. Family History and Colorectal Cancer Risk: Having a mother with colorectal cancer does increase your risk compared to the general population, but it does not necessarily mean you will develop the disease. The absence of a broader family history of colorectal cancer may suggest a lower genetic predisposition. However, it is still crucial to be vigilant about screening, especially given your family history. The general recommendation is to begin screening at age 45 for average-risk individuals, but earlier screening may be warranted for those with a family history.

3. Irritable Bowel Syndrome (IBS) and Stool Consistency: Your experience with IBS, characterized by irregular bowel movements and abdominal discomfort, is common. IBS itself does not typically cause blood in the stool. However, the stress and dietary changes associated with IBS can lead to fluctuations in bowel habits. The presence of soft, unformed stools alone does not contraindicate FOBT; however, if you are experiencing significant changes in your bowel habits or other concerning symptoms, it may be worthwhile to discuss these with your healthcare provider.

4. Fecal Occult Blood Testing Recommendations: Given your concerns about the potential for false positives due to hemorrhoids and your IBS, it is still advisable to proceed with the FOBT. If the test returns positive, further investigation, such as a colonoscopy, may be warranted to rule out any serious conditions, including colorectal cancer. If the test is negative, it can provide reassurance, but it is essential to continue monitoring your symptoms and follow up with your healthcare provider.

5. Age and Screening: At 32 years old, while your risk for colorectal cancer is lower than in older populations, it is essential to remain proactive about your health. If you have any symptoms that concern you, such as changes in bowel habits, persistent abdominal pain, or any rectal bleeding, it is crucial to seek medical advice regardless of your age.

In summary, while hemorrhoids can affect FOBT results, if you have not had recent bleeding, it may not significantly impact the test. Your family history does warrant attention, and screening is essential. Discussing your symptoms and concerns with your healthcare provider will help determine the best course of action for your health. Regular monitoring and open communication with your doctor are key components of maintaining gastrointestinal health.

Similar Q&A

Will Hemorrhoid Bleeding Affect Fecal Occult Blood Test Results?

Hello doctor, today I went to the lab to test for fecal occult blood. After the test, I remembered that last Monday I had a hard stool that caused a tear and bleeding from my hemorrhoids. I would like to ask if this will affect the interpretation of the occult blood test results....

Dr. Cai Jinji reply Gastroenterology and Hepatology
Dear Mr. Xiao Ming: It is recommended that you discuss the examination results with your physician during your follow-up visit. Director Cai Jin-ji, Department of Hepatobiliary and Gastroenterology, Nantou Hospital.

Impact of Toilet Water on Fecal Occult Blood Test Results

If feces fall into the water of the toilet, will it affect the results of a fecal occult blood test (false negative)? Additionally, if there are internal hemorrhoids, can there be blood in the stool, mucus, and narrowing of the stool?

Dr. Lin Hongmao reply Surgery
Dear Sze_wai: When stool falls into the toilet water, if there is bleeding from the lower rectum or anal area, the results of a fecal occult blood test may yield a false negative. It is important to emphasize that early-stage cancer typically presents no symptoms, and the fecal o...

Impact of Meat Consumption and Hemorrhoids on Fecal Occult Blood Test Results

Hello Doctor, I had barbecue, including pork and chicken, 68 hours before my fecal occult blood test. If the test is conducted using immunochemical methods, will this affect the results? Additionally, I have hemorrhoids, but there is no visible bleeding; will this have any impact...

Dr. Chen Shidian reply Gastroenterology and Hepatology
Food does not have an impact. Hemorrhoids may have an effect.

Understanding Colonoscopy Results: What Severe Hemorrhoids Mean for Your Health

Hello doctor, I had a fecal occult blood test in May, which showed a 2+ result. I took the test during my menstrual period. The doctor asked me to retest, and in June, the result was 1+. The doctor recommended a colonoscopy, and after the procedure, he only told me that there wer...

Dr. Chen Qifeng reply Gastroenterology and Hepatology
1. Hemorrhoids can also be a cause of positive fecal occult blood tests, while the intestines may be normal. 2. Severe hemorrhoids may lead to bleeding, prolapse, infection, or even complications such as fistula. Please consult a colorectal surgeon.