Proteinase-3 Antibody

Test Code

34151

CPT Codes
86021

Preferred Specimen

1 mL serum

Minimum Volume

0.3 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis

Methodology
Immunoassay (IA)

Setup Schedule

Set up: Tues-Sat a.m.; Report available: Next day

Reference Range

<1.0 AI		No antibody detected
≥1.0 AI		Antibody detected

Clinical Significance

Autoimmune vasculitis diseases are characterized by abnormal immune responses that result in inflammation and necrosis of blood vessels. The immune dysfunction may be triggered by infection, autoimmune disease, or exposure to a drug; often the cause is unknown. ANCA-associated vasculitis diseases are often characterized by the size of the blood vessels involved. The diseases present with diverse clinical features and are often rapidly progressive, causing irreversible injury to the vessels of the organs affected, such as the kidneys and lungs.

Goodpasture's Syndrome, first described by Ernest Goodpasture in 1919, is characterized today by the triad of diffuse lung hemorrhage, proliferative nephritis and the presence of anti-GBM autoantibodies, which are present as linear deposits along the glomerular and alveolar basement membranes, and as circulating antibodies.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.