Granulomatosis with Polyangiitis (GPA or Wegener's Granulomatosis)

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

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Granulomatosis with Polyangiitis (GPA or Wegener's Granulomatosis) facts

  • Granulomatosis with polyangiitis (GPA or Wegener's granulomatosis) is an uncommon disease that involves inflammation of blood vessels (vasculitis).
  • Symptoms of GPA include:
  • Diagnosis of GPA is confirmed by detecting both abnormal cellular formations, called granulomas, and vasculitis.
  • Treatment is directed toward stopping the inflammation process by suppressing the immune system.

What is granulomatosis with polyangiitis (GPA)?

Granulomatosis with polyangiitis (GPA) is an uncommon type of inflammation of small arteries and veins (vasculitis). It classically involves inflammation of the arteries that supply blood to the tissues of the lungs, the nasal passages(sinuses), and the kidneys. "Incomplete" forms exist that only involve one of these areas. When both lungs and kidneys are affected, the condition is sometimes referred to as generalized granulomatosis with polyangiitis. When only the lungs are involved, the condition is sometimes referred to as limited granulomatosis with polyangiitis (GPA). Doctors typically avoid the older name "Wegener's granulomatosis" because the German physician Friedrich Wegener, the disease's former namesake, was a member of the Nazi party and allegedly linked to Nazi war crimes. The terminology "granulomatosis with polyangiitis" highlights the two central pathologic features of the disease, granuloma formation and inflammation of blood vessels (angiitis or vasculitis).

GPA usually affects young or middle-aged adults. Although it is uncommon in children, it can affect people at any age. The cause of GPA is not known.

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Man with hand joint pain

Joint Pain Symptoms and Signs

  • Joint pain is also referred to as arthralgia.
  • Pain is a feature symptom of joint inflammation with diseases and conditions such as rheumatoid arthritis and osteoarthritis.
  • Joint pain also may be caused by an injury to the ligaments, bursae, tendons, bones, and cartilage surrounding and within the joint.
  • Joint pain also is a symptom of Wegener's granulomatosis.
  • Pain within the joint is a common cause of shoulder pain, ankle pain, and knee pain.

What are symptoms of granulomatosis with polyangiitis (GPA)?

Symptoms of granulomatosis with polyangiitis (GPA) are:

Nasal ulcerations and even bloody nasal discharge can occur. Other areas of the body that can also become inflamed in patients with GPA include the eyes, the nerves (neuropathy), the middle ear (otitis media), and the skin resulting in skin nodules or ulcers.

How is granulomatosis with polyangiitis (GPA) diagnosed?

Abnormal lab findings in patients with granulomatosis with polyangiitis (GPA) include urine tests that detect protein and red blood cells in the urine (not visible to the naked eye) and x-ray tests of the chest and sinuses which detect abnormalities resulting from lung and sinus inflammation. Blood tests that detect the abnormal inflammation include the sedimentation rate (sed rate) and C-reactive protein. A more specific blood test used to diagnose and monitor Wegener's granulomatosis is the antineutrophil cytoplasmic antibody (ANCA test), which is commonly elevated when the disease is active.

The diagnosis of GPA is confirmed by detecting both abnormal cellular formations, called granulomas, and vasculitis in a biopsy of tissue involved with the inflammatory process. For examples, an open lung biopsy or a kidney biopsy are commonly used in making a diagnosis of granulomatosis with polyangiitis.

What is the treatment for granulomatosis with polyangiitis (GPA)?

Granulomatosis with polyangiitis (GPA) is a serious disease and without treatment can be fatal within months. Treatment is directed toward stopping the inflammation process by suppressing the immune system.

Medications used to treat GPA include high-dose cortisone (prednisone) and the immunosuppressive drug cyclophosphamide (Cytoxan). Recent reports also suggest that trimethoprim/sulfamethoxazole (Bactrim) can also be helpful to prevent relapse of disease activity in patients with GPA.

Cytoxan that is taken by mouth with prednisone until the disease is in remission and then switched to methotrexate (Rheumatrex, Trexall) for two years and tapered off has been reported to be effective and less toxic than the traditional long-term Cytoxan treatment.

Methotrexate has recently been introduced as a drug for Cytoxan treatment failures. Moreover, it now appears that Cytoxan will not be necessary in order to maintain long-term remission and that doctors can convert to the less toxic methotrexate for maintenance. The reports also demonstrate that methotrexate can eventually be tapered off entirely after two years. Azathioprine (Imuran) has also been used as a maintenance medication after Cytoxan. Recently, intravenous immunoglobulin therapy (IVIG) has been shown to be helpful in treating relapses of granulomatosis with polyangiitis. Studies suggest that rituximab (Rituxan) may be helpful to maintain remission once the initial inflammatory disease has been controlled using medications mentioned above. These new regimens are welcome news for patients with GPA as medical researchers are searching for better treatments.

What is the prognosis for granulomatosis with polyangiitis (GPA)?

The prognosis for granulomatosis with polyangiitis (GPA) depends on which organs are involved, to what degree they are involved, the duration of the disease, and the response to treatment. Today, with an optimal response to treatment, persons with GPA can lead normal lives.

Medically reviewed by Robert J. Bryg, MD; Board Certified Internal Medicine with subspecialty in Cardiovascular Disease

REFERENCES:

Koopman, William, et al., eds. Clinical Primer of Rheumatology. Philadelphia: Lippincott Williams & Wilkins, 2003.
Kelley's Textbook of Rheumatology, W B Saunders Co, edited by Shaun Ruddy, et al., 2000.American College of Rheumatology National Meeting, November 2005, 2006, 2007.

UpToDate.Clinical manifestations and diagnosis of granulomatosis with polyangiitis and microscopic polyangiitis.

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Reviewed on 9/2/2016
References
Medically reviewed by Robert J. Bryg, MD; Board Certified Internal Medicine with subspecialty in Cardiovascular Disease

REFERENCES:

Koopman, William, et al., eds. Clinical Primer of Rheumatology. Philadelphia: Lippincott Williams & Wilkins, 2003.
Kelley's Textbook of Rheumatology, W B Saunders Co, edited by Shaun Ruddy, et al., 2000.American College of Rheumatology National Meeting, November 2005, 2006, 2007.

UpToDate.Clinical manifestations and diagnosis of granulomatosis with polyangiitis and microscopic polyangiitis.

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