Why Was Wegener's Granulomatosis Changed to GPA?

If you have been diagnosed with Granulomatosis with polyangiitis (GPA), you have likely seen the name “Wegener’s granulomatosis” on lab reports, medical websites, or heard it used by some of your doctors. Please be assured that “Wegener’s” and “GPA” refer to the exact same condition ^[1][2]. In 2011, major medical organizations officially changed the name of the disease. This was done to give the condition a more medically accurate, descriptive name, and to remove the honorific title associated with Dr. Friedrich Wegener after historical research uncovered his affiliations with the Nazi regime ^[2].

One Condition, Two Names

When you are newly diagnosed, encountering two different names for your illness can be confusing and alarming. Granulomatosis with polyangiitis (GPA) is a rare condition that causes inflammation in your predominantly small blood vessels ^[2]. These affected small blood vessels are commonly located in the respiratory tract (including your sinuses and lungs) as well as your kidneys, which is why sinus issues, breathing changes, or kidney problems are often the first symptoms patients experience.

Because “Wegener’s granulomatosis” was the accepted medical term for decades, the transition takes time. It is common to still find the old name in older textbooks, deeply embedded in electronic medical record systems, or used by physicians who completed their medical training before the 2011 shift ^[1]. You do not need to correct your doctor if they use the old name; no matter which name your care team uses in their notes, the tests, monitoring, and approach to your care remain completely identical.

Note: You might also see your condition referred to as an ANCA-associated vasculitis (AAV). This is simply a broader category of diseases that includes GPA, named after the specific antibodies (ANCA) often found in the blood of people with these conditions.

A Push for Descriptive Medical Terms

In the past, diseases were frequently named after the physician who first discovered or documented them—a practice known as using an eponym. Today, the medical community prefers descriptive names that actually explain what is happening inside the patient’s body.

The new name directly describes the physical features of the disease:

• Granulomatosis refers to the presence of granulomas, which are small clusters of inflammatory cells. When these clusters build up, they can damage surrounding tissue and restrict normal blood flow.
• Polyangiitis means inflammation is happening in multiple blood vessels at once.

This shift helps both newly diagnosed patients and healthcare providers immediately understand the nature of the condition, rather than simply memorizing the name of a historical doctor ^[2].

The 2011 Decision

Dr. Friedrich Wegener was a German pathologist who provided early, detailed descriptions of the disease in the 1930s. For decades, the disease bore his name as a mark of respect. However, historical research later revealed that Dr. Wegener was an early member of the Nazi party.

When these historical facts came to light, leading medical organizations stepped in. The American College of Rheumatology (ACR), the European Alliance of Associations for Rheumatology (EULAR), and the American Society of Nephrology (ASN) formally collaborated to phase out the honorific name. In 2011, they officially transitioned the global medical standard to Granulomatosis with polyangiitis (GPA) ^[3]. This unified change ensured that the terminology used in medical practice upholds the ethical standards of the medical community.