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Related Concept Videos

Chronic Obstructive Pulmonary Disease II: Emphysema01:23

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.
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 III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
Alveoli and Alveolar Ducts01:26

Alveoli and Alveolar Ducts

The respiratory zone of the human body, which stands in contrast to the conducting zone, comprises the structures that actively participate in the exchange of gases. The initiation of this zone is marked by the terminal bronchioles converging into respiratory bronchioles, the tiniest bronchiole classification. The respiratory bronchioles give way to the alveolar ducts that opens into a congregation of alveoli. Actively involved in gas exchange, alveoli resemble tiny sacs similar to clusters of...
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.
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Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...

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Related Experiment Video

Updated: May 31, 2026

Refined Murine Model of Idiopathic Pulmonary Fibrosis
07:51

Refined Murine Model of Idiopathic Pulmonary Fibrosis

Published on: June 17, 2025

Pulmonary alveolar microlithiasis.

H J Gayathri Devi1, K N Mohan Rao, K M Prathima

  • 1Department of Chest Diseases, MS Ramaiah Medical College, Bangalore, India.

Lung India : Official Organ of Indian Chest Society
|June 30, 2011
PubMed
Summary
This summary is machine-generated.

Pulmonary alveolar microlithiasis, a rare lung disease, was diagnosed in a young boy. His condition presented as failure to thrive and miliary mottling on chest X-ray, confirmed by lung biopsy.

Keywords:
Pulmonary alveolar microlithiasisbiopsymiliary tuberculosismisdiagnosis

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Area of Science:

  • Pulmonology
  • Rare Diseases
  • Pediatric Medicine

Background:

  • Pulmonary alveolar microlithiasis (PAM) is an uncommon interstitial lung disease.
  • The etiology of PAM remains largely unknown.
  • Diagnosis often relies on characteristic radiographic findings and histological confirmation.

Purpose of the Study:

  • To report a case of pulmonary alveolar microlithiasis in a pediatric patient.
  • To highlight the diagnostic challenges and presentation of this rare condition.

Main Methods:

  • Case report of a young male patient.
  • Clinical presentation including failure to thrive.
  • Imaging studies: chest X-ray demonstrating miliary mottling.
  • Histopathological examination: open lung biopsy.

Main Results:

  • The patient exhibited failure to thrive and radiographic evidence of miliary mottling.
  • Open lung biopsy confirmed the diagnosis of pulmonary alveolar microlithiasis.
  • This case underscores the presentation of PAM in a pediatric demographic.

Conclusions:

  • Pulmonary alveolar microlithiasis can present insidiously in children with non-specific symptoms.
  • Early diagnosis through imaging and biopsy is crucial for managing this rare lung condition.
  • Further research into the pathogenesis of PAM is warranted.