CD18
Test Code
CD18
Description
Collect
Draw one green top tube (Sodium or Lithium Heparin) top tube.
Pediatric Collection
Minimum volume: 1mL blood
Unacceptable Conditions
Frozen, clotted, hemolyzed or centrifuged specimens. Anticoagulants other than heparin. Specimens >24 hrs old.
Storage Transport Temp
Maintain and transport specimens at room temperature (18-22°C).
Ship specimens Priority Overnight via Fed Ex in container sufficiently insulated to avoid temperature extremes (<10°C and >37°C).
Stability
24 hours at room temperature (18-22°C)
Notes
Samples must arrive within 24 hours of draw and are accepted Monday through noon on Friday.
Performed
Tue-Fri
Methodology
Flow Cytometry
Turnaround Time
2-4 days
Department
Immunology Lab - Phenotyping Assays
Synonyms
Leukocyte Adhesion Deficiency (LAD);Chain of CD11 family (CD18);Flow Cytometry (CD18);CD11 family (CD18);cd180;CD18O
Related Tests
Reference Interval
CD18: >192 Mean Fluorescene Intensity (MFI)
Interpretation
LAD-1 is an autosomal recessive disorder caused by mutations in CD18, the common chain of the beta-2 integrin family. The beta-2 integrin family is comprised of LFA-1 (CD11a/CD18), Mac-1/CR3 (CD11b/CD18) and p150/95 (CD11c/CD18). Defects in CD18 therefore affect the expression of CD11a, b and c. Reduction or loss of surface expression of the beta-2 integrins supports the diagnosis of LAD-1.
CPT Code
88184