Autoimmune pancreatitis

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Autoimmune pancreatitis
Diffuse autoimmune pancreatitis.jpg
Synonyms AIP
Pronounce N/A
Specialty N/A
Symptoms Jaundice, abdominal pain, weight loss, diabetes mellitus
Complications Pancreatic cancer, bile duct obstruction, diabetes mellitus
Onset Typically in middle age
Duration Chronic
Types Type 1 (lymphoplasmacytic sclerosing pancreatitis), Type 2 (idiopathic duct-centric pancreatitis)
Causes Autoimmune disease
Risks IgG4-related disease, other autoimmune diseases
Diagnosis Imaging studies, serology, biopsy
Differential diagnosis Pancreatic cancer, chronic pancreatitis
Prevention N/A
Treatment Corticosteroids, immunosuppressive drugs
Medication Prednisone, azathioprine
Prognosis Generally good with treatment
Frequency Rare
Deaths N/A


A form of pancreatitis caused by the body's immune system attacking the pancreas


Autoimmune pancreatitis (AIP) is a rare form of chronic pancreatitis characterized by an autoimmune inflammatory process that affects the pancreas. It is part of a spectrum of autoimmune diseases and is often associated with other systemic autoimmune conditions.

Classification[edit | edit source]

Autoimmune pancreatitis is classified into two types:

Signs and symptoms[edit | edit source]

Patients with autoimmune pancreatitis may present with a variety of symptoms, including:

Diagnosis[edit | edit source]

The diagnosis of autoimmune pancreatitis is based on a combination of clinical, serological, radiological, and histological findings. Key diagnostic criteria include:

  • Elevated serum IgG4 levels (particularly in Type 1 AIP)
  • Characteristic imaging findings on CT scan or MRI, such as diffuse or focal pancreatic enlargement and a "sausage-shaped" pancreas
  • Histological examination showing lymphoplasmacytic infiltration and fibrosis
  • Response to corticosteroid therapy

Treatment[edit | edit source]

The primary treatment for autoimmune pancreatitis is corticosteroid therapy, which typically leads to rapid improvement in symptoms and imaging findings. In some cases, additional immunosuppressive agents such as azathioprine or mycophenolate mofetil may be used to maintain remission.

Prognosis[edit | edit source]

With appropriate treatment, the prognosis for autoimmune pancreatitis is generally good. However, relapses can occur, and long-term follow-up is necessary to monitor for recurrence and manage any associated autoimmune conditions.

See also[edit | edit source]

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Contributors: Prab R. Tumpati, MD