Caplan'S Syndrome In Association With Asbestos: Report Of A Case

Our plain-English summary of Caplan'S Syndrome In Association With Asbestos: Report Of A Case, by S.B. Mattson (1971).

The study

• Author: S.B. Mattson
• Published: Scandinavian Journal Of Respiratory Diseases 52(3):153-161 (1971)
• Type of article: Journal article
• Our copy: from Johns-Manville's own medical library, J-M no. 001366. The article is still under copyright, so we describe it here rather than post it.

In plain English

This was a case report from the Chest Clinic in Borås, Sweden. It described a man who had worked 22 years in an artificial-silk mill. In 1962, while the mill was closed for rebuilding, he was intermittently exposed to asbestos dust for about two months. The fiber type was not named. His chest X-ray in 1964 was normal. Joint pains began in March 1968, and he was later hospitalized with rheumatoid arthritis. A routine chest film in March 1969 showed five rounded opacities in the right lung, four with central cavities, plus pleural plaques. One of six sputum samples showed suspected malignant cells. Surgically removed lung tissue was fibrotic, contained fairly numerous asbestos bodies, and showed rheumatoid granulomas. The histologic diagnosis was asbestosis with rheumatoid pneumoconiosis (Caplan's syndrome). The author believed it was Scandinavia's first reported case. The author concluded that the brief exposure apparently sufficed to produce lung lesions. The author also wrote that when X-rays show multiple round opacities like these, with no evidence of tuberculosis or malignant metastases, the films should be checked for pleural plaques.

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: case report
• Who was studied: One man in Sweden who had worked for 22 years in an artificial-silk mill. He was referred to the Chest Clinic in Borås in 1969.
• Exposure: Intermittent exposure to asbestos dust over about two months in 1962. This happened while the mill was closed for rebuilding and he worked as a builder's mate. The dust came from sheets used for insulation. The fiber type was not stated.
• Main results:
  • A miniature chest X-ray in 1964, two years after the exposure, was normal. A routine film in March 1969 showed lesions inside the chest.
  • Joint pains began in March 1968. Around the end of 1968 he was hospitalized for two months with a diagnosis of rheumatoid arthritis.
  • The X-rays showed five well-defined rounded opacities in the right lung, four of them in the upper lobe. All four upper-lobe lesions had a central cavity.
  • An opacity resembling a pleural plaque, about 10 cm long, lay along the left chest wall. There were calcifications and plaque on the diaphragm.
  • One of six sputum specimens showed atypical cells of suspected malignant nature. Lymph nodes and lung tissue later showed no malignancy.
  • A right-sided pleural effusion developed. A needle biopsy of the pleura showed chronic inflammation without tuberculosis or malignancy.
  • Spirometry gave values within normal limits.
  • The resected lung tissue was fibrotic and contained fairly numerous asbestos bodies. The focal lesions appeared to be rheumatoid granulomas. The histologic diagnosis was asbestosis with rheumatoid pneumoconiosis (Caplan's syndrome).
  • The pleural plaques could not be seen on X-ray two years after the exposure, but were visible after seven years.
• The authors' conclusion: The author concluded that intermittent exposure to asbestos over two months apparently sufficed to produce lung lesions. The author also advised that when X-rays show multiple round opacities like these, with no evidence of tuberculosis or malignant metastases, the films should be checked for pleural plaques.
• Limitations the authors state:
  • The patient's arthritis prevented assessment of his breathing function during exercise.

Topics

Medical terms in this study, explained in our Lexicon: Chest X-Ray, Pleural Plaques, Sputum, Asbestos Bodies, Granuloma, Pneumoconiosis.

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