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Related Concept Videos

Pleural Effusion I: Introduction01:25

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 Management01:28

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 Description01:30

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:
Pleura of the Lungs01:13

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...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...

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Related Experiment Video

Updated: May 23, 2026

Point-of-Care Lung Ultrasound in Adults: Image Acquisition
09:17

Point-of-Care Lung Ultrasound in Adults: Image Acquisition

Published on: March 3, 2023

A pleural effusion of multiple causes.

Edward T H Fysh1, Ranjan L Shrestha2, Benjamin A Wood3

  • 1School of Medicine and Pharmacology and Centre for Asthma, Allergy and Respiratory Research, University of Western Australia, Australia; Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia.

Chest
|April 5, 2012
PubMed
Summary
This summary is machine-generated.

Recurrent pleural effusions can stem from multiple distinct causes, not just one. This case highlights the need for re-evaluation when effusions persist or change, revealing five different diagnoses.

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Last Updated: May 23, 2026

Point-of-Care Lung Ultrasound in Adults: Image Acquisition
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Published on: March 3, 2023

Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion
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Published on: November 10, 2023

A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica
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Area of Science:

  • Pulmonology
  • Thoracic Medicine
  • Diagnostic Challenges in Pleural Diseases

Background:

  • Pleural effusions are common clinical findings with diverse etiologies.
  • Typically, a single diagnosis is assigned to pleural effusions in routine practice.
  • Underrecognition of multiple or changing causes of pleural effusions can occur during disease progression.

Observation:

  • A complex case of recurrent pleural effusions presented with evolving and distinct underlying pathologies.
  • Five different causes were identified sequentially in the same pleural space.
  • Diagnoses included malignant pleural effusion, empyema, chylothorax, hypoalbuminemia-related transudative effusion, and esophagopleural fistula.

Findings:

  • The etiology of pleural effusions can shift over time within a single patient.
  • Concomitant or sequential multiple causes of pleural effusions are often overlooked.
  • This case underscores the dynamic nature of pleural effusion causes.

Implications:

  • Clinicians should consider re-investigating recurrent pleural effusions, even in the same patient.
  • A high index of suspicion for evolving or multiple etiologies is crucial for effective management.
  • Timely and accurate diagnosis of all contributing factors is essential for optimal patient outcomes.