Test ID: BTK
Bruton Tyrosine Kinase (Btk), Protein Expression, Flow Cytometry, Blood
Secondary ID 
A test code used for billing and in test definitions created prior to November 2011
89011
NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.
Conditional
Useful For Suggests clinical disorders or settings where the test may be helpful
Preliminary screening for X-linked agammaglobulinemia (XLA), primarily in male patients (<65 years of age) or female carriers (child-bearing age: <45 years)
Because genotype-phenotype correlations are important, the preferred test for confirming a diagnosis of XLA in males and identifying carrier females is:
-BTKFP/89742 Bruton's Tyrosine Kinase (BTK) Genotype and Protein Analysis, Full Gene Sequence and Flow Cytometry
-In families where a BTK mutation has already been identified, order BTKMP/89740 Bruton's Tyrosine Kinase (BTK) Genotype and Protein Analysis, Known Mutation Sequencing and Flow Cytometry
Method Name A short description of the method used to perform the test
Flow Cytometry
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
Btk Protein Flow, B
Aliases Lists additional common names for a test, as an aid in searching
Btk (Bruton's Tyrosine Kinase)
Tyrosine Kinase
X-Linked Agammaglobulinemia (XLA)
XLA (X-Linked Agammaglobulinemia)
Tyrosine Kinase
X-Linked Agammaglobulinemia (XLA)
XLA (X-Linked Agammaglobulinemia)
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