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Related Concept Videos

Pleural Effusion II: Symptoms and Management01:28

Pleural Effusion II: Symptoms and Management

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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:
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Pleural Effusion I: Introduction01:25

Pleural Effusion I: Introduction

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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...
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Pleural Disorders: Types and Brief Description01:30

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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:
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Pleura of the Lungs01:13

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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...
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Pneumothorax-II01:27

Pneumothorax-II

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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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Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
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Related Experiment Video

Updated: May 3, 2026

A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica
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[Sarcoid pleural effusion].

Nuria Rodríguez-Núñez1, Carlos Rábade1, Luis Valdés1

  • 1Servicio de Neumología, Complejo Hospitalario Clínico-Universitario de Santiago de Compostela, Santiago de Compostela, A Coruña, España.

Medicina Clinica
|February 4, 2014
PubMed
Summary

Pleural effusion, a rare sarcoidosis sign, typically presents as a mild, right-sided exudate. Diagnosis involves identifying non-caseating granulomas, with corticosteroids often aiding recovery.

Keywords:
ChylothoraxDerrame pleuralHemothoraxHemotóraxPleural effusionQuilotóraxSarcoidosis

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Area of Science:

  • Pulmonology
  • Pathology

Context:

  • Pleural effusion (PE) is an infrequent manifestation of sarcoidosis.
  • It affects all ages and genders, across all radiological stages, but is more prevalent in stages I and II.
  • Effusions are typically mild to moderate in size and predominantly right-sided.

Purpose:

  • To describe the clinical characteristics, mechanisms, biochemical profile, diagnostic methods, and outcomes of pleural effusion in sarcoidosis.
  • To elucidate the diverse etiologies of pleural effusion in sarcoidosis, including increased capillary permeability, thoracic duct compression, and pleural vessel involvement.
  • To outline the diagnostic approach, emphasizing biochemical analysis and histopathological confirmation of non-caseating granulomas.

Summary:

  • Sarcoidosis-related pleural effusions are usually pauci-cellular exudates with lymphocytic predominance, though eosinophilic or neutrophilic exudates can occur.
  • Biochemical markers include elevated protein levels relative to lactate dehydrogenase, low adenosine deaminase, and potentially increased CA-125 in women.
  • Diagnosis is confirmed by negative tuberculin tests and the presence of non-caseating granulomas on pleural or lung biopsies.

Impact:

  • Pleural effusions in sarcoidosis often have a favorable, self-limiting course.
  • Corticosteroid therapy is frequently required for resolution.
  • A small subset of cases may necessitate surgical intervention.