The classic pneumoconioses: new epidemiological and laboratory observations

Our plain-English summary of The classic pneumoconioses: new epidemiological and laboratory observations, by A.S. Laney, D.N. Weissman (Clinics in Chest Medicine, 2012).

The study

• Authors: A.S. Laney, D.N. Weissman
• Journal: Clinics in Chest Medicine
• Published: 2012;33(4):745-58
• Type of article: Review
• Cited by: 27 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

The purpose of this article is to provide an update on selected issues of current interest and recent developments related to 3 types of inorganic mineral dust exposures causing classic forms of pneumoconiosis: coal mine dust, crystalline silica, and asbestos. Common themes include new imaging modalities, emerging exposures, and evolving appreciation of additional adverse health effects associated with exposure to these inorganic mineral dusts.

Published by Elsevier Inc.

In plain English

This article was a brief narrative review by authors at the US National Institute for Occupational Safety and Health. It covered recent developments for three mineral dusts that cause pneumoconiosis: coal mine dust, crystalline silica and asbestos. It did not report new data of its own. For asbestos, it described other published work. A 2006 Institute of Medicine report found sufficient evidence of a causal relationship with asbestos only for laryngeal cancer among the cancers it examined. Based on a meta-analysis of available studies, IARC concluded there was sufficient evidence of a causal relationship with ovarian cancer; the pooled standardized mortality ratio was 1.77. A study of chrysotile textile workers linked lung cancer and asbestosis most strongly to thin fibers. The review noted that the role of low-dose CT lung cancer screening for asbestos-exposed people was still evolving. It also reported that the blood test serum mesothelin had a sensitivity of 32% at 95% specificity for malignant mesothelioma. The authors concluded that these dusts are controllable hazards, but that new exposure settings keep emerging and dust-related disease persists.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: narrative review
• Who was studied: No study population of its own; a review of published studies and reports, written from a US perspective
• Exposure: Coal mine dust, crystalline silica and asbestos. The asbestos section covered the 6 regulated types (chrysotile and 5 amphiboles: amosite, crocidolite, actinolite, anthophyllite and tremolite asbestos) as well as erionite, winchite and richterite
• Main results:
  • The review reported that a 2006 Institute of Medicine committee found sufficient evidence of a causal relationship with asbestos only for laryngeal cancer. The committee had evaluated cancers of the pharynx, larynx, esophagus, stomach, and colon and rectum.
  • The review reported that IARC, based on a meta-analysis of available studies, concluded there was sufficient evidence for a causal relationship between asbestos and ovarian cancer. The overall pooled standardized mortality ratio for ovarian cancer was 1.77.
  • The review described a reevaluation of a cohort of chrysotile textile workers. In that cohort, lung cancer and asbestosis were most strongly associated with exposure to thin fibers that phase-contrast light microscopy does not count.
  • The review reported that a meta-analysis found serum mesothelin had a sensitivity of 32% at a threshold giving 95% specificity for malignant mesothelioma. The test was approved in the US in 2007 for monitoring, not for diagnosis.
  • The review cited a 2005 California study that reported residential proximity to naturally occurring asbestos as an independent risk factor for mesothelioma.
  • The review stated that the role of low-dose CT lung cancer screening for asbestos-exposed individuals was still evolving. The National Lung Screening Trial, in older heavy smokers, found a 20% relative decrease in the risk of lung cancer death.
• The authors' conclusion: The authors concluded that coal mine dust, crystalline silica and asbestos are hazards that can be controlled, but that new exposure settings continue to emerge and dust-related disease persists.
• Limitations the authors state:
  • The authors described the review as brief and selective, written from a US perspective, and noted that more comprehensive reviews exist.

Topics

Medical terms in this study, explained in our Lexicon: Pneumoconiosis, Crystalline.

Related studies

• Investigative techniques in the laboratory study of coal workers' pneumoconiosis: recent advances at the cellular level — J.S. Harington (1972)
• Pathologica, physiological, and radiological correlations in the pneumoconioses — E.A. Gaensler, C.B. Carrington, et al. (1972)
• The pneumoconioses — W. Tsai, W.K. Morgan (1996)
• Some investigations into the nature and cause of massive fibrosis (MF) in the lungs of South African gold, coal, and asbestos mine workers — M.C. Leibowitz, B. Goldstein (1987)
• A battle for compensation for Welsh coal miners: JS Haldane v "Sericite" Jones, 1932-1934 — M. Greenberg (1997)
• Electron microscopic findings in the lungs of miners — G. Harrison, N.L. Lapp (1972)

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