Buccal smear

Definition

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

How to prepare for the test

Rinse, wash and swab the mouth as instructed for the particular test ordered.

How the test will feel

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

Why the test is performed

This procedure is used to obtain cells for DNA and chromosome testing for several genetic disorders. It can be used for rapid analysis in the newborn to determine gender or chromosomal abnormalities.

What the risks are

There are no risks associated with the buccal smear.

Illustrations

Throat anatomy

Buccalsmear

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