The need for pathological confirmation of the diagnosis of peritoneal malignant mesothelioma

Our plain-English summary of The need for pathological confirmation of the diagnosis of peritoneal malignant mesothelioma, by S.J. Geyer (American Journal of Industrial Medicine, 2011).

The study

• Author: S.J. Geyer
• Journal: American Journal of Industrial Medicine
• Published: 2011;54(8):646
• Type of article: Letter, Comment
• Read it: PubMed · Publisher

In plain English

This is a letter to the editor, not a study. It reports no new data. The author, a pathologist, commented on an earlier case report by Egilman and Menendez, which described a case of occupational peritoneal mesothelioma said to have come from exposure to tremolite-free chrysotile in Quebec, Canada. The letter pointed out that the autopsy in that case had described pancreatic carcinoma with very pronounced peritoneal carcinomatosis. Three pulmonologists later decided that the patient had died from occupational malignant peritoneal mesothelioma, and Quebec's Board of Health and Safety in the Workplace reached the same conclusion. The author argued that the case report accepted these administrative reviews without documenting the clinical basis for changing the original autopsy diagnosis. The author noted that malignant mesotheliomas and adenocarcinomas may look alike under the microscope. The letter called for a qualified pathologist to examine any surviving tissue, including with immunohistochemistry staining. The author concluded that until such a review is reported, the case's status as a "black swan" remains in question. The letter's disclosure states that the author has testified in asbestos-related litigation.

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: Letter to the editor commenting on a previously published case report; no new data
• Who was studied: The single patient described in the earlier case report by Egilman and Menendez (occupational peritoneal mesothelioma case, Quebec, Canada)
• Exposure: Tremolite-free chrysotile in Quebec, Canada, as described in the case report under discussion
• Main results:
  • The letter noted that the autopsy report in the case described pancreatic carcinoma with very pronounced peritoneal carcinomatosis
  • Three pulmonologists later determined that the patient died from an occupational malignant peritoneal mesothelioma
  • Quebec's Board of Health and Safety in the Workplace reviewed the case and concluded the patient died from peritoneal mesothelioma
  • The author argued that the case report accepted the administrative reviews without documenting the clinical basis for changing the original autopsy diagnosis
  • The author stated that malignant mesotheliomas and adenocarcinomas may display similar pathological features
  • The author recommended that a qualified pathologist examine any surviving tissues, including with immunohistochemistry staining, to validate the diagnosis
  • The letter's disclosure statement says the author has testified in litigation involving asbestos-related disease
• The authors' conclusion: The author concluded that until a complete and contemporary pathology review is reported, the case's status as a 'black swan' (peritoneal mesothelioma from tremolite-free chrysotile) remains in question

Topics

The National Library of Medicine indexes this study under subjects our site covers: Chrysotile, Mesothelioma, Peritoneal mesothelioma.

Medical terms in this study, explained in our Lexicon: Malignant Mesothelioma.

Related studies

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• Malignant peritoneal mesothelioma in a 17-year-old boy with evidence of previous exposure to chrysotile and tremolite asbestos — A. Andrion, S. Bosia, et al. (1994)
• Diffuse peritoneal mesothelioma: A case series of 62 patients including paraoccupational exposures to chrysotile asbestos — R.L. Kradin, G. Eng, et al. (2017)
• An elaboration of "proof" of peritoneal mesothelioma from tremolite free chrysotile — D. Egilman (2011)
• Peritoneal mesothelioma: PSOGI/EURACAN clinical practice guidelines for diagnosis, treatment and follow-up — S. Kusamura, V. Kepenekian, et al. (2021)
• Loss of BAP1 expression is very rare in peritoneal and gynecologic serous adenocarcinomas and can be useful in the differential diagnosis with abdominal mesothelioma — J. Andrici, J. Jung, et al. (2016)

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