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    Buccal smear

    Sex chromatin test

    A buccal (pronounced "buckle") smear is the painless removal of a sample of cells from the inside of your mouth(cheek) for study.

    How the Test is Performed

    The health care provider will gently scrape the inside of the cheek with a small spatula to collect cells for testing. Sometimes, you can do this yourself.

    How to Prepare for the Test

    Rinse and wash the mouth as instructed.

    How the Test Will Feel

    You will feel a scraping sensation as cells are removed from the cheek.

    Why the Test is Performed

    This test is done to get cells for chromosome or DNA analysis, most often for genetic testing.

    The International Olympic Committee adopted the test many years ago to help detect male imposters among female athletes. When the test is used in this way, it's called the sex chromatin test.

    This test may also help establish the sexual identity of newborns.

    Risks

    There are no risks.

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    • Throat anatomy

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    • Buccal smear

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      • Throat anatomy

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      • Buccal smear

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      Self Care

        Tests for Buccal smear

        Review Date: 1/4/2013

        Reviewed By: Chad Haldeman-Englert, MD, Wake Forest School of Medicine, Department of Pediatrics, Section on Medical Genetics, Winston-Salem, NC. Review provided by VeriMed Healthcare Network. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, and Stephanie Slon.

        The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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        St. Luke's Hospital - 232 South Woods Mill Road - Chesterfield, MO 63017 Main Number: 314-434-1500 Emergency Dept: 314-205-6990 Patient Billing: 888-924-9200
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