IMMUNOGLOBULIN IGG4 SUBCLASS

What this test checks

Measures IgG4 subclass — elevated in IgG4-related disease, a chronic autoimmune condition.

Why do people get this test?

Used in suspected IgG4-related disease.

When you should consider this test

• Pancreatic mass with high IgG4
• Salivary gland swelling
• Specialist requested

How to prepare

No fasting needed.