This flow cytometry assay is intended to be used as a screening test. Screening tests are not 100% sensitive nor specific, and a normal result should not preclude molecular sequencing if a patient's clinical presentation suggests that the probability of a diagnosis is high.
Specimens are accepted Monday through Thursday between 12:00 noon and 4:00 pm only and must be received by the performing laboratory within 24 hours of collection. Collect specimen in lavender top tube. Send intact whole blood at room temperature. Do not refrigerate or freeze.
Specimen must be received Monday - Thursday between 12:00 noon and 4:00 pm.
Test includes intracellular expression of Perforin and Granzyme B in NK cells, CD8+ cells, and NKT cells. Test sent to Cincinnati Children's Hospital.