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Patterning Cells on Optically Transparent Indium Tin Oxide Electrodes
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Indium Lung: Discovery, Pathophysiology and Prevention.

Tatsuya Chonan1, Atsuko Amata1, Yoshinori Kawabata2

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PubMed
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Indium exposure can cause serious lung disease, known as indium lung, characterized by interstitial pneumonia and emphysema. Early detection and screening are crucial to prevent irreversible lung damage and detect potential lung cancer complications.

Keywords:
cholesterol crystalsindium-tin oxideinterstitial pneumonialiquid crystal displayspulmonary alveolar proteinosis

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Area of Science:

  • Occupational Health
  • Pulmonary Medicine
  • Toxicology

Background:

  • Indium compounds, primarily indium-tin oxide (ITO), are essential for liquid crystal displays.
  • Pulmonary toxicity from indium exposure, termed indium lung, has gained recognition in the last two decades.
  • Reported cases include interstitial pneumonia, emphysema, granulomas, and alveolar proteinosis.

Purpose of the Study:

  • To investigate the relationship between serum indium concentration (sIn) and lung damage in indium workers.
  • To assess the progression of lung disease, including emphysema, even after exposure cessation.
  • To highlight the need for early detection and screening for complications like lung cancer.

Main Methods:

  • Cross-sectional and longitudinal studies of indium workers.
  • High-resolution computed tomography (HRCT) for assessing lung changes.
  • Measurement of serum indium concentration (sIn) and biomarkers (KL-6, SP-D).

Main Results:

  • Serum indium concentration (sIn) correlates with exposure duration, HRCT findings (interstitial and emphysematous changes), and biomarkers.
  • While sIn and interstitial changes may decrease after exposure cessation, emphysematous lesions can worsen.
  • A case of lung cancer was reported in a non-smoking ex-worker with a history of indium lung.

Conclusions:

  • Indium lung is a significant occupational hazard requiring early detection to prevent irreversible lung damage.
  • Emphysematous changes may progress even after exposure ends, necessitating ongoing monitoring.
  • Screening for lung cancer in individuals with indium lung is recommended due to potential associations.