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Related Concept Videos

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...
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...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Obstructive Pulmonary Disease I: Introduction01:23

Chronic Obstructive Pulmonary Disease I: Introduction

Chronic obstructive pulmonary disease is a common, preventable, and treatable respiratory disorder characterized by persistent symptoms and progressive airflow limitation. This limitation results from a combination of small-airway disease (obstructive bronchiolitis) and parenchymal destruction (emphysema), both driven by chronic inflammation from exposure to harmful particles or gases.The disease includes two main pathological entities: emphysema, marked by destruction of alveolar walls and...

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Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
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Published on: December 19, 2020

Cryptogenic organizing pneumonia.

Vincent Cottin1, Jean-François Cordier

  • 1Hospices Civils de Lyon, Louis Pradel Hospital, National Reference Centre for Rare Pulmonary Diseases, Department of Respiratory Medicine, University Claude Bernard Lyon I, University of Lyon, Lyon, France. vincent.cottin@chu-lyon.fr

Seminars in Respiratory and Critical Care Medicine
|September 25, 2012
PubMed
Summary
This summary is machine-generated.

Organizing pneumonia (OP) is a lung disease characterized by granulation tissue in airspaces. Differentiating OP from fibrosis is key, as cryptogenic organizing pneumonia (COP) often responds well to corticosteroids, though relapses can occur.

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Published on: July 12, 2018

Area of Science:

  • Pulmonology
  • Pathology
  • Radiology

Background:

  • Organizing pneumonia (OP) is a pathological pattern involving granulation tissue in pulmonary airspaces.
  • Cryptogenic organizing pneumonia (COP) is diagnosed when no cause for OP is identified.
  • OP involves alveolar injury, fibrin deposition, and fibroblast proliferation.

Purpose of the Study:

  • To analyze features differentiating reversible OP from irreversible fibrotic processes.
  • To understand the distinct outcomes of COP versus idiopathic pulmonary fibrosis (IPF).
  • To review the diagnostic imaging patterns and therapeutic approaches for COP.

Main Methods:

  • Review of characteristic pathological patterns of OP.
  • Analysis of three main imaging patterns of COP: typical, focal, and diffuse infiltrative.
  • Consideration of histopathological confirmation and exclusion of other causes for diagnosis.

Main Results:

  • COP diagnosis relies on clinical presentation, characteristic pathology, and exclusion of causes.
  • Common imaging patterns include patchy opacities, focal masses, and diffuse infiltrates; the reversed halo sign is also noted.
  • Corticosteroid therapy typically leads to rapid clinical and imaging improvement.

Conclusions:

  • Distinguishing OP from fibrosis is crucial for patient outcomes.
  • Typical COP cases may be managed without biopsy, but vigilance for alternative diagnoses is essential.
  • Patients require monitoring for potential relapses after corticosteroid cessation.