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Related Concept Videos

Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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:
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
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...
Other Pulmonary Disorders01:17

Other Pulmonary Disorders

Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...

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Related Experiment Video

Updated: May 9, 2026

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification
10:21

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification

Published on: September 20, 2024

Unicentric Castleman's Disease Arising from an Intrapulmonary Lymph Node.

Hideki Ota1, Hideki Kawai, Tsubasa Matsuo

  • 1Department of Thoracic Surgery, Akita Red Cross Hospital, Akita 010-1495, Japan.

Case Reports in Surgery
|July 11, 2013
PubMed
Summary

This case study highlights the accurate preoperative diagnosis of intrapulmonary unicentric Castleman

Area of Science:

  • Thoracic Surgery
  • Diagnostic Imaging
  • Oncology

Background:

  • Castleman's disease is a rare lymphoproliferative disorder with unknown causes.
  • Intrapulmonary unicentric Castleman's disease is exceptionally rare and difficult to diagnose preoperatively due to nonspecific imaging features.
  • Mediastinal involvement is most common, making intrapulmonary presentations particularly challenging.

Purpose of the Study:

  • To report a case of intrapulmonary unicentric Castleman's disease diagnosed preoperatively.
  • To demonstrate the utility of advanced computed tomography (CT) techniques in diagnosing this rare condition.
  • To emphasize the importance of detailed imaging analysis for accurate preoperative diagnosis.

Main Methods:

  • A 19-year-old asymptomatic male with an incidentally found lung mass.

Related Experiment Videos

Last Updated: May 9, 2026

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification
10:21

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification

Published on: September 20, 2024

  • Diagnostic workup included chest X-ray, dynamic contrast-enhanced CT, and 3D-CT angiography.
  • Surgical intervention via video-assisted thoracoscopic surgical lobectomy.

    • Main Results:

    • Dynamic CT revealed a well-defined, hypervascular, soft-tissue mass with calcifications in the right lower lung.
    • 3D-CT angiography identified the mass's blood supply originating from right bronchial arteries.
    • The findings were consistent with unicentric Castleman's disease, leading to successful surgical resection.

    Conclusions:

    • Contrast-enhanced CT and 3D-CT angiography are valuable tools for diagnosing intrapulmonary unicentric Castleman's disease.
    • Advanced imaging can aid in achieving a reliable preoperative diagnosis for rare thoracic tumors.
    • This case underscores the potential for accurate diagnosis of rare intrapulmonary lesions with detailed imaging.