Hidden in plain sight: a narrative review on environmental exposures and the fight against mesothelioma

Our plain-English summary of Hidden in plain sight: a narrative review on environmental exposures and the fight against mesothelioma, by P. Behinaein, J.N. Patel, I. Okereke (Journal of Thoracic Disease, 2026).

The study

• Authors: P. Behinaein, J.N. Patel, I. Okereke
• Journal: Journal of Thoracic Disease
• Published: 2026;18(2):166
• Type of article: Review
• Read it: PubMed · Publisher · Free full text

Abstract

Background And Objective: Mesothelioma remains lethal, with a growing share linked to non-occupational exposure in community settings. This review synthesizes contemporary epidemiology, mechanisms, exposure sources, diagnosis, treatment and public health strategies.

Methods: This narrative review was conducted to synthesize heterogeneous evidence addressing environmental and para-occupational asbestos exposure and its relationship to malignant mesothelioma. A structured literature search was performed using PubMed/MEDLINE, Embase, and Web of Science databases for articles published through 2025. Terms related exclusively to occupational exposure were deliberately deprioritized. Studies were eligible for inclusion if they met at least one of the following criteria: (I) epidemiological investigations evaluating non-occupational, environmental, or para-occupational asbestos exposure; (II) mechanistic or toxicological studies elucidating fiber pathogenicity relevant to environmental exposure scenarios; (III) investigations of population clusters associated with naturally occurring or construction-related mineral fibers; (IV) studies assessing environmental remediation, surveillance strategies, or public-health interventions; or (V) clinical investigations reporting data stratified by exposure category. Articles focusing exclusively on occupational exposure without environmental relevance were excluded. Case reports without exposure characterization, editorials without primary data, and studies lacking clear methodological description were also excluded.

Key Content And Findings: Environmental risk arises from naturally occurring asbestos (NOA), legacy building materials, industrial residues and para-occupational transfer into homes. Case mix is shifting toward women, younger patients and peritoneal presentations in geologic or industrial hotspots. Fiber biopersistence drives chronic inflammation, oxidative injury and mesothelial transformation. Systemic therapy now centers on dual checkpoint blockade as a first-line standard, with chemo-immunotherapy and platinum-pemetrexed backbones, and selective use of bevacizumab. Surgery is reserved for candidates in expert centers, favoring lung-sparing pleurectomy and decortication when macroscopic clearance is plausible. Prevention requires total prohibition of new asbestos use, disciplined legacy management, robust enforcement, land-use controls in NOA terrains, and household protections.

Conclusions: Environmental drivers will sustain mesothelioma burden unless exposure pathways are eliminated and legacy sources are controlled. Clinical gains come from immunotherapy, selective surgery and coordinated supportive care, but prevention and earlier detection carry the greatest impact. A unified agenda that couples exposure science with equitable public health action is essential to bend incidence and improve outcomes.

© AME Publishing Company.

In plain English

This article was a narrative review, not a new study. The authors searched PubMed/MEDLINE, Embase and Web of Science for articles on mesothelioma linked to environmental and para-occupational (household) asbestos exposure. They excluded articles that focused only on occupational exposure without environmental relevance, and they summarized the evidence in words rather than pooling numbers. They did not report how many studies were included. Drawing on that literature, the review described several sources of exposure: naturally occurring asbestos in rock, legacy building materials, industrial residues, and fibers carried home from work. It reported that environmental cases more often occur in younger people and in women. It also reported that symptoms and clinical findings do not reliably separate environmental from occupational cases, that inherited BAP1 changes lower the exposure needed for disease, and that no safe exposure threshold has been established. The authors concluded that prevention and earlier detection remain decisive, with controlled removal of friable asbestos materials as a key intervention. They noted that environmental exposure data are often incomplete and that definitions of low-dose exposure vary widely.

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 with a structured literature search and qualitative (non-meta-analytic) synthesis
• Who was studied: Published literature from PubMed/MEDLINE, Embase and Web of Science. The search was dated October 17, 2025, with a stated timeframe of January 1960 to December 2025, and was limited to English or English-translated articles. Articles focused exclusively on occupational exposure without environmental relevance were excluded. The number of included studies was not reported.
• Exposure: Non-occupational asbestos exposure from naturally occurring asbestos, legacy building materials, industrial residues and para-occupational transfer into homes. The review also covered asbestos-like fibers such as erionite, fluoro-edenite and vermiculite (Libby, Montana), and engineered fibers such as carbon nanotubes.
• Main results:
  • From the literature reviewed, environmental cases were described as more frequent in younger people and in women, particularly near naturally occurring asbestos deposits or industrially contaminated areas.
  • The review stated that clinical presentation does not reliably separate environmental from occupational mesothelioma.
  • For clusters linked to fluoro-edenite in Biancavilla, vermiculite in Libby and erionite in Turkey, the review stated that a substantial proportion of cases are attributable to occupational and para-occupational handling of these minerals, not only to ambient environmental exposure.
  • The review stated that germline BAP1 tumor predisposition syndrome lowers the exposure threshold for carcinogenesis.
  • The review stated that no safe threshold for asbestos exposure has been established.
  • The review stated that the blood markers soluble mesothelin-related peptide and osteopontin have limited diagnostic accuracy and are not recommended for routine diagnosis.
  • The authors described the identification and controlled removal of friable asbestos materials in buildings and infrastructure as among the most impactful public-health interventions.
• The authors' conclusion: The authors concluded that prevention and earlier detection remain decisive in reducing mesothelioma from environmental exposure.
• Limitations the authors state:
  • Environmental exposure data are frequently incomplete, heterogeneous and retrospective.
  • Definitions of low-dose exposure vary widely, and standardized quantitative thresholds are lacking.
  • Separating occupational from environmental exposure is limited by recall bias and incomplete work histories.
  • Environmental monitoring infrastructure is uneven across regions, which limits generalizability.

Topics

Medical terms in this study, explained in our Lexicon: Environmental Exposure, Mesothelioma, Non-Occupational Exposure, Epidemiology, Asbestos Exposure, Occupational Exposure, Mineral Fiber, naturally occurring asbestos (NOA).

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