Colonoscopy with Endoscopic Biopsy (Colon Tissue Sampling)
This procedure involves examining your large intestine (colon) using a flexible tube with a camera (endoscope) and taking small tissue samples for testing. It helps diagnose conditions like inflammation, polyps, or cancer.
["A colonoscopy with biopsy can reveal early signs of digestive health issues and guide treatment plans."]
Key facts at a glance
- LOINC
- 111871-0
- Short code
- Img-Enhncd endoscpy Colon Colonoscopy
- Synonyms
- Img-Enhncd endoscpy Colon Colonoscopy
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- colonoscopy
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your doctor may recommend a colonoscopy with biopsy if you have symptoms like persistent abdominal pain, unexplained weight loss, changes in bowel habits, or a family history of colorectal cancer. It may also be part of screening for people at higher risk. This test helps check for abnormalities such as polyps, ulcers, or signs of inflammation.
What to Expect Before the Procedure
You’ll likely need to prepare by following a clear-liquid diet and taking laxatives a few days before. Bowel cleansing helps ensure a clear view of your colon. On the day of the procedure, you may receive a sedative to relax you. Bring someone with you to drive you home afterward.
During the Procedure
The procedure takes about 30 to 60 minutes. The doctor inserts the endoscope through your rectum, moving it slowly through your colon. If needed, small tissue samples (biopsies) will be taken from areas of concern. You may feel mild discomfort, but the sedative helps keep you calm.
After the Procedure
You’ll rest for a short time before going home. Avoid heavy meals or strenuous activity for the rest of the day. Check with your doctor if you have severe pain, bleeding, or signs of infection. Follow-up tests may be needed if biopsies were taken.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Biopsies from the colonoscopy can detect abnormal cells, such as those in polyps or early-stage cancer. These samples are sent to a lab for microscopic examination to identify issues like inflammation (e.g., Crohn’s disease or ulcerative colitis), infections, or precancerous changes. Early detection improves treatment options and outcomes.
Frequently asked questions
How long will I need to prepare for this test?
Will I feel pain during the colonoscopy?
What happens if a biopsy is taken during the procedure?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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