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Pleural Effusion I: Introduction

Pleural Effusion I: Introduction

Pleural effusion is an abnormal fluid accumulation in the pleural cavity, a narrow space between the lungs and the chest wall. It is not a disease per se but rather a symptom or indication of an underlying disease. In normal circumstances, this space contains a small amount of fluid (5 to 15 mL), a lubricant facilitating the non-frictional movement of the pleural surfaces.
There are two main types of pleural effusion: transudative and exudative. They are differentiated using Light's criteria,...

Pleural Effusion II: Symptoms and Management

Pleural Effusion II: Symptoms and Management

Pleural Effusion Overview
A pleural effusion is the abnormal collection of fluid between the parietal and visceral pleura layers of tissue that form the lining of the lungs and chest cavity. It can occur independently or due to surrounding parenchymal diseases, such as infection, malignancy, or inflammatory conditions.
Clinical Manifestations:

Pleural Disorders: Types and Brief Description

Pleural Disorders: Types and Brief Description

The pleura is a vital part of the respiratory system. It's a double-layered membrane surrounding the lungs and lining the chest cavity. The two layers of the pleura are:

Cholecystitis

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...

Pleura of the Lungs

Pleura of the Lungs

The lungs are nestled in a cavity, shielded by the pleura. The pleura, a form of serous membrane, wraps around each lung. This membrane arrangement consists of two layers: the visceral and parietal pleurae. The visceral pleura lines the surface of the lungIn contrast, the parietal pleura is the outer layer and contacts to the thoracic wall, the mediastinum, and the diaphragm. The hilum is the point of connection between the visceral and parietal layers. The space between the parietal and...

Pneumothorax-II

Pneumothorax-II

Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:

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Related Experiment Video

Updated: Jun 5, 2026

Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion

Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion

Published on: November 10, 2023

Chylothorax and cholesterol pleural effusion.

J Terrill Huggins¹

¹Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Medical University of South Carolina, Charleston, South Carolina 29425, USA. hugginjt@musc.edu

Seminars in Respiratory and Critical Care Medicine

|January 8, 2011

Summary

Chylothorax and cholesterol pleural effusions are distinct lipid effusions. Differentiating their causes and management is crucial for effective treatment of these complex pleural conditions.

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Last Updated: Jun 5, 2026

Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion

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Laparoscopic Choledochal Cyst Excision and Roux-en-Y Choledochojejunostomy in Adults

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Published on: February 28, 2025

Area of Science:

Pulmonology
Thoracic Medicine
Pleural Diseases

Background:

Lipid pleural effusions, including chylothorax and cholesterol effusions, present as milky fluid.
Despite similar appearances, these effusions differ significantly in pathogenesis, diagnosis, and management.

Purpose of the Study:

To delineate the key distinctions between chylothorax and cholesterol pleural effusion.
To clarify diagnostic criteria and therapeutic approaches for each type of lipid effusion.

Main Methods:

Review of existing literature on lipid pleural effusions.
Analysis of diagnostic markers such as triglyceride levels and chylomicrons.
Examination of radiographic findings and treatment modalities.

Main Results:

Chylothorax involves chyle leakage due to thoracic duct issues, diagnosed by triglycerides > 110 mg/dL or chylomicrons.
Cholesterol effusions are linked to chronic inflammation (e.g., tuberculosis, rheumatoid pleurisy) with thickened pleura.
Management varies from treating underlying conditions to surgical intervention or decortication.

Conclusions:

Accurate differentiation of chylothorax and cholesterol effusion is essential for appropriate patient management.
Treatment strategies must be tailored to the specific etiology and clinical presentation of the lipid effusion.