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Understanding Your Medical Test: What It Is, Why It's Done, and What Your Results Mean

Published: August 9, 2026Updated: August 16, 2026

This test records whether adenomas (precancerous polyps) were found during a colonoscopy or sigmoidoscopy examination of the colon.

Quick summary

{"Adenomas are precancerous growths that can develop into colorectal cancer if left untreated","Finding and removing adenomas during colonoscopy prevents colorectal cancer","The presence of adenomas determines your future screening schedule","Regular colonoscopy screening is recommended for adults over 45-50 years old","No adenomas found means lower risk for colorectal cancer"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
67172-7
Short code
ADENCOL
Synonyms
Adenomas colonoscopy PhenX
Category
chemistry
Sample
serum
Container
N/A - This is a procedural finding, not a blood collection
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
≥ 40 years
Method
phenx
CPT
45378-45398 (colonoscopy codes vary by complexity and findings)
SNOMED
265764009
Specimen volume
N/A - Visual endoscopic examination
Stability
N/A - In situ visual examination
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

This is a diagnostic test that helps your healthcare provider evaluate how your body is functioning. It may measure substances in your blood, urine, or another type of sample, and the findings give your care team important clues about your overall health and any conditions that may need further attention.

This test records whether adenomas were found during a colonoscopy or sigmoidoscopy procedure. A colonoscopy examines the entire colon using a flexible camera tube, while a sigmoidoscopy examines only the lower part. Adenomas, also known as adenomatous polyps, are abnormal growths that can potentially become cancerous over time. This test result indicates whether any such precancerous growths were detected and removed during the procedure.

Your provider may order this test to confirm or rule out a suspected condition, monitor an illness you already have, check how well a current treatment is working, or screen for problems before symptoms appear. The results play a key role in guiding decisions about your diagnosis, treatment plan, and follow-up care.

This examination is performed primarily for colorectal cancer screening and prevention. It helps detect precancerous adenomas before they develop into cancer. If adenomas are found and removed during the procedure, cancer can be prevented. The findings also help determine how often you need future colonoscopies - people with adenomas typically need more frequent follow-up exams.

During the procedure, a trained member of your care team will collect the needed sample, which may involve drawing a small amount of blood from a vein in your arm or asking you to provide a urine specimen. The process is usually quick and only mildly uncomfortable, and you can typically return to your normal activities right afterward.

Before the procedure, you will need to clean your colon by following a special diet and taking laxatives. During the colonoscopy, you will be sedated while the doctor inserts a flexible tube with a camera through the rectum to examine the entire colon. If any polyps or abnormal growths are found, they are typically removed immediately and sent to a laboratory for analysis. The procedure usually takes 30-60 minutes.

Your results will show whether your values fall within the normal reference range established for this test. Results that are higher or lower than expected do not always mean something is seriously wrong, so your provider will review them with you, explain what they mean in your situation, and discuss any next steps or additional testing that may be helpful.

If adenomas are found, your doctor will classify them based on their type, size, and number. This information helps determine your risk for colorectal cancer and guides recommendations for follow-up examinations. Finding adenomas is actually a positive outcome because it means potential cancer has been prevented through their removal.

Reference range

No adenomas detected - normal finding. Presence of adenomas requires follow-up per colonoscopy surveillance guidelinesN/A

Specimen: serum

Bowel preparation required as per colonoscopy/sigmoidoscopy protocol. Patients should follow specific diet and laxative instructions provided by endoscopy center. Inform physician of medications that may affect bleeding

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

The detection of adenomas during colonoscopy is clinically significant because adenomas are the precursors to most colorectal cancers. Finding and removing adenomas reduces the risk of colorectal cancer by 70-90%. The number, size, and histology of adenomas found determine the interval for subsequent surveillance colonoscopies - patients with adenomas may need repeat exams in 3-5 years, while those without adenomas may wait 10 years.

This test result also helps identify patients who may have genetic conditions like Lynch syndrome if multiple or large adenomas are found at a young age. Such patients may benefit from genetic counseling and extended family screening.

Frequently asked questions

Does finding adenomas mean I have cancer?
No, adenomas are precancerous growths, not cancer. They are benign tumors that have the potential to become cancerous over many years if not removed. Finding and removing adenomas during colonoscopy actually prevents cancer from developing.
How often should I have a colonoscopy?
If no adenomas are found, most guidelines recommend repeating colonoscopy every 10 years. If adenomas are found, your doctor will recommend follow-up based on the adenoma characteristics - typically 3-5 years for most patients, or sooner for those with advanced adenomas.
Is the colonoscopy procedure painful?
Most patients receive sedation medications during the procedure and do not experience pain. You may feel some bloating or cramping afterward as the air used during the procedure is absorbed. The preparation (bowel cleansing) is often considered the most uncomfortable part.
What are the risks of removing adenomas?
Complications from polypectomy (adenoma removal) are rare but can include bleeding or perforation (hole) in the colon. These occur in less than 1% of procedures. Your doctor will discuss these risks with you before the procedure.
Who should get a colonoscopy?
Routine colonoscopy screening is recommended for adults beginning at age 45-50, depending on guidelines. People with family history of colorectal cancer or adenomas may need to start earlier. Individuals with symptoms like blood in stool, unexplained weight loss, or persistent bowel changes should discuss screening with their doctor regardless of age.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy