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Chronic Pancreatitis I: Introduction

Chronic Pancreatitis I: Introduction

Chronic pancreatitis is a long-standing, relapsing inflammation of the pancreas, characterized by irreversible damage to the gland. It results in progressive destruction of the pancreatic parenchyma, fibrosis, and eventual loss of both exocrine and endocrine function. The disease may evolve gradually after multiple episodes of acute pancreatitis or develop independently.EtiologyChronic pancreatitis can arise from a variety of causes:Alcohol use is the leading cause, accounting for 70–80% of...

Chronic Pancreatitis I: Introduction

Chronic Pancreatitis I: Introduction

The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...

Acute Pancreatitis I: Introduction

Acute Pancreatitis I: Introduction

Acute pancreatitis is the sudden inflammation of the pancreas caused by the early activation of digestive enzymes, leading to the autodigestion of pancreatic tissue. This results in local inflammation and, in severe cases, systemic complications.EtiologyUnderstanding the underlying causes is crucial, as identifying the etiology guides treatment and anticipates complications. Acute pancreatitis can be triggered by various factors, typically grouped into the following clinical categories.Biliary...

Acute Pancreatitis I: Introduction

Acute Pancreatitis I: Introduction

Pancreatitis is inflammation of the pancreas, an organ located behind the stomach. It can be either acute or chronic.
Acute pancreatitis is characterized by rapid inflammation of the pancreas, often caused by factors like gallstone blockage or excessive alcohol consumption. Chronic pancreatitis, on the other hand, is a slow, progressive inflammation that may result from long-term alcohol abuse, obstructions in the pancreatic duct, or genetic factors.
The causes of acute pancreatitis include:

Acute Pancreatitis II: Pathophysiology

Acute Pancreatitis II: Pathophysiology

The pathophysiology of acute pancreatitis centers on injury to pancreatic acinar cells, which initiates a cascade of harmful intracellular events.This injury leads to premature activation of trypsinogen to trypsin in the pancreas. Trypsin then activates other digestive enzymes, such as chymotrypsin, elastase, and phospholipase A2, which begin breaking down pancreatic tissue. The resulting autodigestion causes local inflammation, tissue swelling, hemorrhage, and fat necrosis.Injured acinar cells...

Chronic Pancreatitis II: Pathophysiology

Chronic Pancreatitis II: Pathophysiology

Chronic pancreatitis is a progressive and irreversible inflammation of the pancreas, most often caused by long-term alcohol abuse, but it can also be related to ductal obstruction, smoking, or genetic factors.Chronic pancreatitis occurs when the pancreas is repeatedly exposed to harmful agents like alcohol, smoking, ductal obstruction, or genetic predisposition. These factors lead to the release of toxic metabolites and inflammatory cytokines, sustaining chronic inflammation in the pancreatic...

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Updated: May 13, 2026

An Obstructive Chronic Pancreatitis Model Established Through Electrocoagulation

An Obstructive Chronic Pancreatitis Model Established Through Electrocoagulation

Published on: October 31, 2025

Autoimmune pancreatitis: current concepts.

Qian Wang¹, Xuan Zhang, Fengchun Zhang

¹Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing 100730, China.

Science China. Life Sciences

|March 26, 2013

Summary

Autoimmune pancreatitis (AIP) is a chronic pancreatitis subtype with distinct features. Early diagnosis and treatment, often with steroids, improve outcomes, though relapses may require immunosuppressants.

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Area of Science:

Gastroenterology
Immunology
Pathology

Background:

Autoimmune pancreatitis (AIP) is a distinct chronic pancreatitis form.
It presents with unique clinical, pathological, serological, and imaging findings.
Two subtypes, Type I and Type II, have been identified with differing demographics and characteristics.

Purpose of the Study:

To summarize the key features of autoimmune pancreatitis.
To highlight diagnostic criteria and differential diagnoses.
To discuss treatment strategies and prognosis.

Main Methods:

Review of clinical, pathological, serological, and imaging studies on AIP.
Analysis of subtype characteristics and extrapancreatic manifestations.
Evaluation of treatment responses and therapeutic options.

Main Results:

AIP often presents with obstructive jaundice, pancreatic enlargement, mass, and ductal strictures.
Type I AIP (IgG4-related) is common in elderly Asian males; Type II AIP is more common in Caucasians.
Elevated serum IgG4 levels are crucial for Type I AIP diagnosis; extrapancreatic complications are frequent.

Conclusions:

AIP requires prompt diagnosis and treatment, typically with glucocorticoids.
Relapses are common, necessitating immunosuppressive therapy or novel treatments like rituximab.
Prognosis is generally favorable with timely intervention, and spontaneous remission is possible.