Referred Tests
| Web: | mayocliniclabs.com |
|---|---|
| Email: | mcl@mayo.edu |
| Telephone: | 800-533-1710 |
| International: | +1 855-379-3115 |
| Values are valid only on day of printing. | |
Test ID: BTKS
Bruton Tyrosine Kinase (BTK) Genotype, Full Gene Sequence, Blood
Specimen Type 
Describes the specimen type validated for testing
Advisory Information
The preferred test for confirming a diagnosis of X-linked agammaglobulinemia in males and identifying carrier females is BTKFP / Bruton Tyrosine Kinase (BTK) Genotype and Protein Analysis, Full Gene Sequence and Flow Cytometry
For cases where the differential diagnosis remains broad, BTK may be evaluated as part of a larger genetic panel, see BCLGP / B-Cell Deficiency Primary Immunodeficiency (PID) Gene Panel.
Necessary Information
1. Bruton Tyrosine Kinase (BTK) Genotype Patient Information (T620) is required, see Special Instructions. Testing may proceed without the patient information however it aids in providing a more thorough interpretation. Ordering providers are strongly encouraged to complete the form and send it with the specimen.
2. Include physician name and phone number with specimen.
Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Multiple whole blood EDTA genotype tests can be performed on a single specimen after a single extraction. See Multiple Whole Blood EDTA Genotype Tests in Special Instructions for a list of tests that can be ordered together.
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions: Send specimen in original tube.
Special Instructions Library of PDFs including pertinent information and forms related to the test
Forms
New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:
Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory
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 performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood EDTA | Refrigerated (preferred) | ||
| Ambient | |||