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Pulmonary Tuberculosis II

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...

Other Pulmonary Disorders

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.

Pulmonary Hypertension: Classification and Pathogenesis

Pulmonary Hypertension: Classification and Pathogenesis

Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...

Pulmonary Tuberculosis III

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:

Chronic Obstructive Pulmonary Disease II: Emphysema

Chronic Obstructive Pulmonary Disease II: Emphysema

Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.

Atypical Pneumonia

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...

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Related Experiment Video

Updated: Jun 19, 2026

Refined Murine Model of Idiopathic Pulmonary Fibrosis

Refined Murine Model of Idiopathic Pulmonary Fibrosis

Published on: June 17, 2025

[Primary nodular pulmonary amyloidosis].

Koichi Morisaki¹, F Shoji, D Kawano

¹Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan.

Kyobu Geka. the Japanese Journal of Thoracic Surgery

|October 16, 2009

Summary

A pulmonary nodule found on chest imaging was investigated. Surgical analysis revealed the nodule was composed of amyloid protein, not lung cancer.

Related Experiment Videos

Last Updated: Jun 19, 2026

Refined Murine Model of Idiopathic Pulmonary Fibrosis

Refined Murine Model of Idiopathic Pulmonary Fibrosis

Published on: June 17, 2025

Area of Science:

Pulmonary Medicine
Radiology
Pathology

Background:

Nodular lung lesions require accurate diagnosis to differentiate benign from malignant conditions.
Advanced imaging techniques like CT and PET scans aid in characterizing pulmonary nodules.

Observation:

A 58-year-old woman presented with an upper lung field nodule detected via chest roentgenography.
Computed tomography (CT) revealed an irregular nodule in the right upper lobe.
Fluorodeoxyglucose positron emission tomography (FDG-PET) showed no significant accumulation in the nodule.

Findings:

Video-assisted thoracic surgery (VATS) was performed for definitive diagnosis.
Histologic examination confirmed the pulmonary nodule was composed of amyloid protein.
The findings excluded primary lung cancer.

Implications:

This case highlights the importance of integrating imaging findings with surgical pathology for diagnosing rare pulmonary conditions.
Amyloid deposition in the lung can mimic malignant nodules, necessitating thorough investigation.
Understanding the imaging characteristics of pulmonary amyloidosis is crucial for appropriate patient management.