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Test Catalog

Test ID: FBUCC    
X and Y Aneuploidy Detection, Buccal Smear, FISH

Specimen Type Describes the specimen type needed for testing

Buccal Swab

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Provide a reason for referral with each specimen. The laboratory will not delay or reject testing if this information is not provided, but appropriate testing and interpretation may be compromised.


Container/Tube: Buccal Smear Collection Kit (Supply T543)

Specimen Volume: 2 Cyto-Pak brushes

Collection Instructions:

1. Patient should rinse out mouth vigorously with mouthwash followed by water for approximately 15 seconds. Mouthwash is not a requirement but helps reduce the bacteria found in the mouth that may hinder testing.

2. Remove the Cyto-Pak brush from the container only touching the "stick" end. Save the container.

3. Using medium pressure, rotate the brush several times on the inside of the cheek.

4. Return brush to container and cap.

5. Repeat steps 2 through 4 on the other cheek using the second brush.

6. It is important that the patient's buccal cells are not contaminated with cells from any other source. Do not touch the bristles. Do not brush too vigorously. If blood appears, discard the brush and restart the collection process.

7. Label each container with patient's name and order number or hospital/clinic number.

Additional Information:

1. Provide appropriate clinical information about the patient as per specific test requirements.

2. It is important that the cells do not dry out during shipping. Ensure that the container is tightly sealed.


1. New York Clients-Informed consent is required. Please document on the request form or electronic order that a copy is on file. An Informed Consent for Genetic Testing (Supply T576) is available in Special Instructions.

2. If not ordering electronically, submit a Cytogenetics/AFP Congenital Disorders Request Form (Supply T238) with the specimen.

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

2 Cyto-Pak brushes

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected










Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
Buccal SwabAmbient (preferred)