Buccal smear

Sex chromatin test; Buccal swab

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

Buccal  smear - illustration

A buccal smear is a test where cells are taken from the cheek. Cells are collected by scraping the cheek with a cotton swab. The cells can be used for genetic testing, as well as evaluated for the presence of Barr bodies (a mass seen in a normal female sex chromosome). When used for that purpose, the buccal smear test can confirm whether the patient is a male or female.

How the Test is Performed

How to Prepare for the Test

How the Test will Feel

Why the Test is Performed