The Pneumoconioses Diagnosis, Evaluation, and Management

Our plain-English summary of The Pneumoconioses Diagnosis, Evaluation, and Management, by E. Mayer, F. Princi, N.L. Kaltreider, et al (1963).

The study

• Authors: E. Mayer, F. Princi, N.L. Kaltreider, A.J. Vorwald, G.W. Wright, E.P. Pendergrass, O.A. Sander
• Published: Archives of Environmental Health Volume 7, PP.130-171. August 1963.
• Type of article: Journal article
• Our copy: from Johns-Manville's own medical library. The article is still under copyright, so we describe it here rather than post it.

In plain English

This 1963 statement by the American Medical Association's Committee on the Pneumoconioses was a review, not a new study. Written for general physicians, it summarized what was then known about diagnosing, evaluating and managing lung diseases caused by inhaled dusts and fumes, including silicosis, asbestosis, berylliosis and coalworkers' pneumoconiosis. It described asbestosis as a diffuse, non-nodular fibrosis and noted that long, flexible asbestos fibers can reach the small airways. The statement described an association between bronchogenic carcinoma and well-established asbestosis, particularly with long exposures. It also pointed to experiences in South Africa, where pleural mesotheliomas had been found in persons exposed to crocidolite-amosite asbestos. It stated that early asbestosis is hard to see on x-rays: some patients with no x-ray evidence had asbestosis on lung biopsy. It added that breathing impairment is often worse than the x-ray suggests, and that asbestos bodies alone indicate exposure, not disease. The authors stated that diagnosis should rest on occupational history, x-ray findings and clinical picture together, and that further asbestos exposure should be minimized in workers with asbestosis.

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: Review and consensus statement by an American Medical Association committee (not an original study)
• Who was studied: No study population; the statement was written for general physicians and covered workers exposed to industrial dusts and fumes in general
• Exposure: Inhaled industrial dusts and fumes, including free crystalline silica, asbestos (including crocidolite-amosite asbestos in the South African experience cited), beryllium, coal, talc, diatomaceous earth, iron, tin and barium
• Main results:
  • Asbestosis was described as a diffuse, non-nodular fibrosis involving the alveolar walls, interlobular septa and visceral pleura
  • Elongated asbestos fibers were described as an exception to the rule that large particles do not reach the deep lung
  • An association between bronchogenic carcinoma and asbestosis was described in workers with well-established asbestosis, particularly those with long exposures (passage partly illegible in the scan)
  • The statement pointed to experiences in South Africa, where pleural mesotheliomas had been found in an appreciable number of persons exposed to crocidolite-amosite asbestos; these were others' observations, not findings of this statement
  • Some patients whose x-rays showed no detectable disease had lung biopsies showing asbestosis
  • In asbestosis, physiologic impairment was often much more severe than the chest x-ray would suggest
  • The presence of asbestos bodies was said to be significant only in relation to exposure and not to mean, by itself, that the disease is asbestosis
  • There seemed to be no greater incidence of tuberculosis in workers with asbestosis than in the general population
• The authors' conclusion: The authors stated that diagnosis of a dust disease should rest on occupational history, abnormal x-ray shadows and a compatible clinical picture together. For asbestosis, they stated that every effort should be made to minimize further exposure to asbestos fibers.
• Limitations the authors state:
  • The authors stated that a meaningful classification of the pneumoconioses could not be devised for the statement
  • The authors noted that data comparing workers' lung function before and after disease developed had not yet been obtained

Topics

Medical terms in this study, explained in our Lexicon: Silicosis, Pneumoconiosis, Fibrosis, Bronchogenic Carcinoma, Pleural Mesothelioma, Crocidolite, Amosite, Biopsy.

Browse return to medical research.