Test Overview
Test Methodology

Flow Cytometry

Test Usage

This test is a screening test and further analyses will be required to complete a diagnostic workup for common variable immunodeficiency (CVID) (eg, CVID / Common Variable Immunodeficiency Confirmation Flow Panel, Blood) and hyper-IgM (XHIM / X-Linked Hyper IgM Syndrome, Blood and CD40 / B-Cell CD40 Expression by Flow Cytometry, Blood).

Reference Range *

Interpretive report is provided

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday - Friday
Analytic Time

4 - 5 days

Soft Order Code
Reference Laboratory
Mayo (IABCS)
Special Testing
Specimen Requirements
Collection Instructions

Collect 2 EDTA lav top tubes- one remains ambient (label as "TBBS"), one is refrigerated (label as "IABC"). Send to Specimen Processing as whole blood- do not spin. Only collect Mon-Thurs, and if needed, call a stat courier to ensure the specimen is received at UH/Sendouts by 7pm at the latest.

Alternate Specimen
Pink top tube is acceptable
Normal Volume
3 mL whole blood in ambient tube for TBBS; 10 mL EDTA whole blood, refrigerated for IABC
Minimum Volume
1 mL ambient; 5 mL refrigerated
Storage Temperature
This test needs TWO tubes- One tube is ambient, one tube is refrigerated
Additional Information

Test performed by Mayo Clinic Laboratories

CPT Code
86355, 86357, 86359, 86360, 86356 x7, (88184, 88185 x2 if needed)