Primary Pleural Mesothelioma

Our plain-English summary of Primary Pleural Mesothelioma, by J.L. Kovarik (1976).

The study

• Author: J.L. Kovarik
• Published: Cancer 38(4):1816-1825, October (1976)
• Type of article: Journal article
• Our copy: from Johns-Manville's own medical library, J-M no. 002294. The article is still under copyright, so we describe it here rather than post it.

In plain English

This article was a case series in which the author described nine patients with primary pleural mesothelioma. Three patients, all women, had localized benign tumors in the left chest, and one of them later had a recurrence on the right side. Five patients, all men, had the diffuse malignant type. One woman had multiple discrete pleural tumors. All patients underwent chest surgery (thoracotomy). Patients with the diffuse type survived on average less than 9 months. Only one patient, the woman whose tumor recurred, had clubbing of the fingers and toes, and no patient had an abnormal blood sugar level. Three of the nine patients, all men with the diffuse type, gave a history of possible industrial asbestos exposure; one had worked as a pipe fitter. No asbestos bodies were found in tissue removed from the patients, including one case examined with an electron microscope. The author concluded that a causal link between asbestos and pleural mesothelioma remained an interesting but unproven theory.

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 series (clinical report of nine patients, with a discussion of earlier literature)
• Who was studied: nine patients with primary pleural mesothelioma (four women, five men); where and when they were treated is not legible in the text
• Exposure: history of possible industrial asbestos exposure in three of the nine patients, all men; one is described as a pipe fitter. Fiber types are not stated for the patients.
• Main results:
  • Three patients, all women, had localized benign tumors in the left chest; one later had a recurrence on the right
  • Five patients had the diffuse malignant type, and all were male
  • One woman (Case 9) had multiple discrete pleural tumors, which the author described as a type between the localized and diffuse types
  • All patients underwent thoracotomy
  • Average survival for the diffuse type in this series was less than 9 months
  • No asbestos bodies were found in tissue removed from the patients, even when the electron microscope was used in Case 7
  • Three of the nine patients gave a history of possible industrial asbestos exposure; all were male and had the diffuse type
  • Case 1 was the only patient with clubbing. It came back when her tumor appeared on the opposite side.
  • No patient in the series had an abnormal blood glucose level
• The authors' conclusion: The author concluded that the causative relationship of asbestos to pleural mesothelioma remained an interesting but as yet unproven theory

Topics

Medical terms in this study, explained in our Lexicon: Pleural Mesothelioma, Thoracotomy, Clubbing, Asbestos Exposure, Asbestos Bodies.

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