LOINC display name : Bruton tyrosine kinase FC Nar (B cells monocytes) [Interp];
LOINC long common name : Bruton tyrosine kinase [Interpretation] in B cells monocytes by Flow cytometry (FC)
Narrative;
LOINC short name : Btk B cells mono FC-Imp;
LOINC description : Analysis of the Bruton tyrosine kinase (Btk) protein by flow cytometry is performed
as a preliminary screen for X-linked agammaglobulinemia (XLA), primarily in male patients
( 65 years of age) or female carriers (child-bearing age: 45 years). Since genotype-phenotype
correlations are important, BTK gene sequencing [LOINC: 35295-5] is performed when
the Btk protein is absent by flow cytometry to confirm the diagnosis of XLA.;
Has component