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Related Concept Videos

Portal Hypertension01:22

Portal Hypertension

Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
Diseases of the Liver and Gallbladder01:26

Diseases of the Liver and Gallbladder

Liver and gallbladder diseases are a significant health concern, with prominent conditions including cirrhosis, hepatitis, non-alcoholic fatty liver disease (NAFLD), and gallstones. Jaundice is a common manifestation of liver and biliary disease.
Cirrhosis is characterized by the scarring of hepatic lobules in the liver, which are replaced by fibrous tissue, affecting the liver's normal functioning. NAFLD, on the other hand, is caused by an excessive build-up of fat in the liver, not related to...
Jaundice01:25

Jaundice

Jaundice, or icterus, is the yellow discoloration of the skin, sclerae, and mucous membranes. It happens when plasma bilirubin levels rise above 2.5-3 mg/dL, leading to bilirubin deposition in tissue.Bilirubin is a byproduct of hemoglobin degradation. In macrophages, hemoglobin breaks down into globin and heme. Globin is converted into amino acids, while heme is turned into biliverdin by heme oxygenase, which is then reduced to unconjugated bilirubin by biliverdin reductase.Unconjugated...
Cholecystitis01:20

Cholecystitis

Cholecystitis is inflammation of the gallbladder, most commonly caused by obstruction of the cystic duct. This blockage prevents bile from draining, leading to gallbladder distension, inflammation, and potentially serious complications. This condition may present acutely or chronically and can happen with or without gallstones.EtiologyAbout 95% of cholecystitis cases are calculous, caused by gallstones blocking the cystic duct, leading to bile accumulation and inflammation of the gallbladder...
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess the...
Cirrhosis II: Pathophysiology01:24

Cirrhosis II: Pathophysiology

Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...

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Related Experiment Videos

Hepatobiliary pathology.

Jay H Lefkowitch1

  • 1Department of Pathology, College of Physicians and Surgeons, Columbia University, New York, New York 10032, USA. jhl3@columbia.edu

Current Opinion in Gastroenterology
|April 7, 2007
PubMed
Summary

Recent research highlights liver and biliary tract disorders, focusing on bystander hepatitis from infections, diabetic liver lesions like glycogenic hepatopathy, and causes of liver dysfunction post-transplant.

Area of Science:

  • Hepatology
  • Transplant Pathology
  • Infectious Disease

Background:

  • Liver and biliary tract disorders encompass a range of conditions with complex pathogenesis.
  • Understanding morphologic changes is crucial for accurate diagnosis and management.
  • Recent advancements have shed light on previously unclear aspects of these diseases.

Purpose of the Study:

  • To review and highlight recent scientific papers on liver and biliary tract disorders.
  • To clarify the pathogenesis and morphologic changes associated with these conditions.
  • To provide an overview of current understanding in the field.

Main Methods:

  • Literature review of recent publications.
  • Analysis of studies focusing on pathogenesis and morphologic changes.

Related Experiment Videos

  • Synthesis of findings related to specific liver conditions.

    • Main Results:

    • Bystander hepatitis, characterized by CD8-positive T cell infiltration, is linked to extrahepatic infections (e.g., influenza, SARS).
    • Diabetic liver lesions include glycogenic hepatopathy (hepatocyte swelling due to glycogen) and diabetic hepatosclerosis (perisinusoidal fibrosis).
    • Ground-glass hepatocellular inclusions were noted in hepatitis B virus-negative patients, often transplant recipients on immunosuppressants. A Banff consensus paper detailed histologic features of liver allograft dysfunction.

    Conclusions:

    • Recent literature provides insights into collateral liver damage from extrahepatic infections.
    • Diabetic liver lesions represent a significant area of study with distinct morphologic features.
    • Understanding the causes of liver dysfunction after transplantation is critical for patient outcomes.