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Test ID: BTKK
Bruton's Tyrosine Kinase (BTK) Genotype, Known Mutation

Secondary ID A test code used for billing and in test definitions created prior to November 2011

89306

Useful For Suggests clinical disorders or settings where the test may be helpful

As a follow-up confirmatory genetic test for relatives of X-linked agammaglobulinemia (XLA) patients with a previously identified Bruton’s tyrosine kinase gene (BTK) mutation, after abnormal Btk protein expression has been previously demonstrated (eg, #89011 "Bruton's Tyrosine Kinase (Btk), Protein Expression, Flow Cytometry, Blood")

 

Because genotype-phenotype correlations are important, the preferred test for confirming a diagnosis of XLA in males and identifying carrier females in families where a BTK mutation has already been identified is #89740 "Bruton's Tyrosine Kinase (BTK) Genotype and Protein Analysis, Known Mutation Sequencing and Flow Cytometry," which provides a comprehensive assessment of both protein and DNA analysis.

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDSecondary IDReporting NameAvailable SeparatelyAlways Performed
BTKKM29304BTK Gene, Known MutationNoYes
BTKKQ89286BTK Gene, Known Mutation SequencingNoYes

Additional Tests Lists test(s) that are always performed, at an additional charge, with the initial test(s)

Test IDTest NumberReporting NameAvailable SeparatelyAlways Performed
NPLXT81769Rapid DNA ExtractionNoYes

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

When this test is ordered, a DNA extraction will always be

performed at an additional charge.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

Method Name A short description of the method used to perform the test

Polymerase Chain Reaction (PCR) Followed by

DNA Sequence Analysis

(PCR is utilized pursuant to a license agreement

with Roche Molecular Systems, Inc.)

Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

BTK Gene, Known Mutation

Aliases Lists additional common names for a test, as an aid in searching

Agammaglobulinaemia tyrosine kinase
B-cell progenitor kinase
Bruton agammaglobulinemia tyrosine kinase
Bruton tyrosine kinase
Bruton's tyrosine kinase
BTK
dominant-negative kinase-deficient Brutons tyrosine kinase
Tyrosine-protein kinase BTK