Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients
Decode results, prep for appointments, weigh options.
Caregivers & advocates
Carry the research load for someone you love.
Providers & clinicians
Resources for patients in your practice.
Log In Ask a Question
PubMed This is a summary of 72 peer-reviewed journal articles Updated

A Patient's Guide to Polyarteritis Nodosa (PAN)

At a Glance

Polyarteritis nodosa (PAN) is a rare vasculitis causing inflammation in medium-sized arteries. It can affect internal organs or be limited to the skin. Accurate diagnosis requires biopsies or angiography, while treatment relies on steroids and immunosuppressants to manage the inflammation.

Polyarteritis nodosa (PAN) is a rare and complex condition, and hearing this diagnosis can feel overwhelming. You are likely dealing with unfamiliar medical terms and navigating a healthcare system that may not have much experience with your specific disease. This guide is designed to empower you with evidence-based information so you can understand your condition and advocate for the best possible care.

PAN is a form of vasculitis, meaning it involves inflammation of the blood vessels. However, it behaves in very specific ways, primarily targeting medium-sized arteries. Because it can affect many different parts of the body, no two patients have exactly the same experience.

We have broken down the most important information you need into six detailed sections. We recommend starting with the basics of the disease and moving through the diagnostic and treatment strategies:

01

Understanding Polyarteritis Nodosa (PAN)

Learn about Polyarteritis Nodosa (PAN), a rare vasculitis affecting medium arteries. Understand causes, symptoms, ANCA testing, and how PAN is diagnosed.

02

Symptoms and Subtypes: Systemic vs. Cutaneous PAN

Learn the differences between Systemic and Cutaneous Polyarteritis Nodosa (PAN). Understand symptoms like mononeuritis multiplex and the DADA2 genetic mimic.

03

Diagnosis and Pathology: Biopsies and Angiography

Learn how Polyarteritis nodosa (PAN) is diagnosed using tissue biopsies and angiography. Understand what necrotizing arteritis and a negative ANCA test mean.

04

Treatment Strategies and Guidelines

Explore standard treatments for Polyarteritis Nodosa (PAN). Learn about ACR guidelines, steroid tapering, cyclophosphamide, and targeted DADA2 therapies.

05

Risk Stratification: The Five-Factor Score

Learn how doctors use the Five-Factor Score (FFS) to measure Polyarteritis nodosa (PAN) severity. Understand what an FFS of 0 or 1 means for your treatment.

06

Living with PAN: Your Care Team and Long-Term Health

Learn how to manage Polyarteritis nodosa (PAN) long-term. Understand how to build a care team, monitor for relapses, and handle treatment side effects.

You do not have to read everything at once. Take your time, focus on the information that is most relevant to where you are right now in your medical journey, and use the questions provided on each page to guide your conversations with your doctors.

Common questions in this guide

What is Polyarteritis nodosa (PAN)?
Polyarteritis nodosa (PAN) is a rare form of vasculitis that causes inflammation primarily in medium-sized arteries. Because it can affect many different parts of the body, symptoms vary widely from patient to patient depending on which blood vessels are involved.
What is the difference between systemic and cutaneous PAN?
Systemic PAN affects internal organs and generally requires more aggressive treatment. Cutaneous PAN is limited to the skin. Your doctor will run specific tests to determine which subtype you have, as this directly dictates your treatment plan.
How is Polyarteritis nodosa diagnosed?
Doctors typically confirm a PAN diagnosis using a combination of tissue biopsies and imaging tests called angiography. These specialized tests allow your medical team to look for the specific patterns of inflammation and blood vessel damage that characterize PAN.
Should I be treated at a specialized vasculitis center for PAN?
Because PAN is a very rare disease, local clinics may not see many cases. It is highly recommended to connect with a specialized vasculitis center where doctors have extensive experience navigating the complexities of this specific condition and its modern treatments.
What are the standard treatments for Polyarteritis nodosa?
The modern standard of care focuses on controlling inflammation using steroids alongside powerful immunosuppressant medications. Doctors use a scoring system called the Five-Factor Score to determine disease severity and customize how aggressive your treatment needs to be.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Given the rarity of Polyarteritis nodosa (PAN), how many cases have you or this clinic treated?
  2. 2.Are you connected with a specialized vasculitis center that we can consult if my case becomes complex?
  3. 3.What is our immediate next step to determine if I have systemic or cutaneous PAN?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

This guide is for informational purposes only and does not replace professional medical advice. Always consult your healthcare provider or a specialist at a vasculitis center regarding your specific Polyarteritis nodosa (PAN) diagnosis and treatment plan.

Get notified when new evidence is published on Polyarteritis nodosa.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.