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Related Concept Videos

Chronic Pancreatitis I: Introduction01:24

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...
Chronic Pancreatitis I: Introduction01:25

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 II: Pathophysiology01:21

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...
Acute Pancreatitis II: Pathophysiology01:21

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...
Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
Acute Pancreatitis I: Introduction01:27

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:

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Related Experiment Video

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Staining Protocols for Human Pancreatic Islets
07:48

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Published on: May 23, 2012

Autoimmune pancreatitis: histo- and immunopathological features.

Günter Klöppel1, Bence Sipos, Giuseppe Zamboni

  • 1Department of Pathology, University of Kiel, Michaelisstr, 11, 24105, Kiel, Germany.

Journal of Gastroenterology
|May 24, 2007
PubMed
Summary

Autoimmune pancreatitis (AIP) is a distinct form of chronic pancreatitis. Key features include specific immune cell infiltration and tissue changes, aiding its diagnosis.

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Published on: May 23, 2012

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Area of Science:

  • Gastroenterology
  • Immunology
  • Pathology

Background:

  • Autoimmune pancreatitis (AIP) is increasingly recognized as a unique subtype of chronic pancreatitis.
  • It is defined by characteristic histopathological and immunological findings.
  • AIP shares features with other conditions, necessitating precise diagnostic criteria.

Purpose of the Study:

  • To delineate the key diagnostic features of autoimmune pancreatitis.
  • To differentiate AIP from other forms of chronic pancreatitis.
  • To highlight the role of IgG4 in AIP diagnosis.

Main Methods:

  • Histopathological examination of pancreatic tissue.
  • Immunohistochemical analysis for IgG4-positive plasma cells.
  • Morphological assessment of periductal inflammation, epithelial lesions, and sclerosis.

Main Results:

  • Morphological hallmarks include lymphoplasmacytic infiltration, granulocytic epithelial lesions, venulitis, and sclerosis.
  • AIP commonly affects the pancreatic head and distal bile duct.
  • A high count of IgG4-positive plasma cells (over 20 per high-power field) is highly specific for AIP diagnosis.

Conclusions:

  • Autoimmune pancreatitis is a distinct clinicopathological entity.
  • Characteristic histological findings and IgG4 staining are crucial for diagnosing AIP.
  • Accurate diagnosis of AIP is essential for appropriate management and differentiating it from other pancreatic diseases.