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Polyp biopsy

Definition

A polyp is a test that takes a sample of, or removes polyps (abnormal growths) for examination.

How the Test is Performed

Polyps are growths of tissue that may be attached by a stalk-like structure (a ). Polyps are commonly found in organs with many blood vessels. Such organs include the , , stomach, and .

Some polyps are cancerous (malignant) and the cancer cells are likely to spread. Most polyps are noncancerous (benign). The most common site of polyps that are precancerous and are treated is the colon.

How a polyp biopsy is done depends on the location:

  • or flexible sigmoidoscopy examines the large bowel
  • examines the vagina and cervix
  • (EGD) or other is used for the throat, stomach, and small bowel
  • Laryngoscopy is used for the nose and throat

    • For areas of the body that can be seen or where the polyp can be felt, a numbing medicine is applied to the skin. Then a small piece of the tissue that appears to be abnormal is removed. This tissue is sent to a laboratory. There, it is tested to see if it is cancerous.

    How to Prepare for the Test

    If the biopsy is in the nose or another surface that is open or can be seen, no special preparation is needed. Your health care provider will tell you if you need to not eat or drink anything (fast) before the biopsy.

    More preparation is needed for biopsies inside the body. For example, if you have a biopsy of the stomach, you should not eat anything for several hours before the procedure. If you are having a colonoscopy, drinking a solution to clean your bowels is needed before the procedure.

    Follow your provider's preparation instructions exactly.

    How the Test will Feel

    Numbing medicine is given locally before removing polyps on the surface of the skin. You may feel tugging while the biopsy sample is being taken. After the numbing medicine wears off, the area may be sore for a few days.

    Biopsies of polyps inside the body are done during procedures such as EGD or colonoscopy. Usually, you will not feel anything during or after the biopsy.

    Why the Test is Performed

    The test is done to determine if the growth is cancerous (malignant). The procedure may also be done to relieve symptoms, such as with the removal of nasal polyps.

    Normal Results

    Examination of the biopsy sample shows the polyp to be benign (not cancerous).

    What Abnormal Results Mean

    Cancer cells are present. This may be a sign of a cancerous . Further tests may be needed. Often, the polyp may need more treatment. This is to ensure it is completely removed.

    Risks

    Risks include:

  • Bleeding
  • Hole (perforation) in the organ from which the polyp was removed
  • Infection

    • References

    Bachert C, Zhang N, Gevaert P. Rhinosinusitis and nasal polyps. In: Burks AW, Holgate ST, O'Hehir RE, et al, eds. Middleton's Allergy: Principles and Practice. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 41.

    Pohl H, Draganov P, Soetikno R, Kaltenbach T. Colonoscopic polypectomy, mucosal resection, and submucosal dissection. In: Chandrasekhara V, Elmunzer BJ, Khashab MA, Muthusamy VR, eds. Clinical Gastrointestinal Endoscopy. 3rd ed. Philadelphia, PA: Elsevier; 2019:chap 37.

    Raymond L, Lentz GM. Endoscopy in minimally invasive gynecologic surgery. In: Gershenson DM, Lentz GM, Valea FA, Lobo RA, eds. Comprehensive Gynecology. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 10.

    Samlan RA, Kunduk M. Visual documentation of the larynx. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 54.

    Schedule An Appointment

    Contact Atlanta Obsetrics and Gynaecology at The Womens Center Millennium Hospital - 404-ATL-BABY

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    Review Date: 1/22/2023

    Reviewed By: Denis Hadjiliadis, MD, MHS, Paul F. Harron, Jr. Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.