The Hämoccult test is a simple procedure for detecting blood in the stool that is not visible to the naked eye. It provides evidence of colorectal polyps and colorectal cancer, as well as gastrointestinal bleeding of unknown cause.
When is the fecal occult blood test used for colorectal cancer screening?
The Hemoccult test is used in colorectal cancer screening for people aged 50 and older. In addition to a digital rectal exam and a colonoscopy, a positive Hemoccult test may indicate the presence of colorectal cancer or colorectal polyps. A Hemoccult test can also be helpful when gastric or intestinal bleeding of unknown cause is suspected.
The Hemoccult test is one of the most important early detection tests for colorectal cancer @ Wolfilser /AdobeStock
How is the Hemoccult test performed?
The patient receives three test envelopes, into which they place three stool samples. Each envelope contains two test fields, into which the patient places two small stool samples using a spatula. The patient then seals the envelopes and returns them to the doctor’s office. A laboratory subsequently analyzes the samples.
What should you keep in mind when taking a Hemoccult test?
Before and during the Hämoccult test, you should follow these dietary recommendations. Otherwise, the test results may be false positives:
- Do not eat raw meat, such as rare steak or raw ground meat
- Do not eat blood sausage
- Avoid tomatoes, bananas, cauliflower, and broccoli
High doses of vitamin C can cause a false-negative test result.
How reliable is the Hämoccult test?
A positive Hämoccult test can reliably detect blood in the stool. However, you should follow the dietary recommendations before and during the test. This will help you avoid false-positive or false-negative test results.
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Sabine Schneider
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Sabine Schneider – medical author: Explore expert articles and medical expertise in the Leading Medicine Guide.
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