Advanced Diagnostic Laboratories

Collect

Draw one green top tube (Sodium or Lithium Heparin) top tube.

Specimen Preparation

Do NOT centrifuge! Keep at room temperature (18-22°C).

Preferred volume: 4 mL

Pediatric Collection

Minimum volume: 2 mL 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 should be received within 24 hours of draw. Samples are accepted Monday through noon on Friday.

Performed

Tue-Fri

Methodology

Flow Cytometry

Reported

2-4 days

Department

Immunology Lab - Phenotyping Assays

Synonyms

Leukocyte Adhesion Deficiency (LAD), Adherence, Markers

Related Tests

DHR, NBT, CTX, BACT, CD18, CDA11, C11CO, 11BO

Reference Interval

• CD11a: >29 Mean Fluorescence Intensity (MFI)
• CD11b: >154 MFI, CD11c: >113 MFI, CD18: >192 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, 88185 X 3