1
|
Araki T, Yanagawa M, Sun F, Dupuis J, Nishino M, Yamada Y, Washko GR, Christiani DC, Tomiyama N, O’Connor GT, Hunninghake GM, Hatabu H. Pleural abnormalities in the Framingham Heart Study: prevalence and CT image features. Occup Environ Med 2017; 74:756-761. [PMID: 28468931 PMCID: PMC5701783 DOI: 10.1136/oemed-2016-104178] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 03/14/2017] [Accepted: 03/24/2017] [Indexed: 11/04/2022]
Abstract
BACKGROUND The prevalence of pleural abnormalities in the general population is an epidemiologically important index of asbestos exposure, which has not been investigated since a radiography-based study in 1980. METHODS We examined 2633 chest CT scans (mean 59.2 years, 50% female) from the Framingham Heart Study (FHS) for the presence and image characteristics of pleural plaques and diffuse pleural thickening. Demographics and pulmonary function were stratified by the presence of pleural abnormalities in association with interstitial lung abnormalities. RESULTS Pleural abnormalities were present in 1.5% (95% CI 1.1% to 2.1%). Pleural lesions were most commonly bilateral (90.0%), multiple (77.5%), calcified (97.5%) and commonly involved posterior (lower: 92.5%, middle: 87.5%), anterior (upper: 77.5%, middle: 77.5%) and diaphragmatic areas (72.5%). Participants with pleural abnormalities were significantly older (75.7 years, p <0.0001), male (92.5%, p <0.0001), former or current smokers (80.0%, p <0.001) with higher pack-years (33.3, p <0.0001). No significant reduction was noted in pulmonary function measures (p=0.07-0.94) when adjusted for the associated covariates, likely due to small number of cases with pleural abnormalities. Information about prior history of asbestos exposure and occupation was not available. CONCLUSIONS Pleural plaques and diffuse pleural thickening are present on CT in 1.5% of the FHS cohort. The current prevalence of the pleural abnormalities is smaller than that reported in the previous population-based study using chest radiography, likely representing lower asbestos exposure in recent decades. The posterior portion of the pleura is most frequently involved but the anterior portion is also commonly involved.
Collapse
Affiliation(s)
- Tetsuro Araki
- Department of Radiology, Center for Pulmonary Functional Imaging, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Masahiro Yanagawa
- Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fangui Sun
- Department of Biostatistics, Boston University School of Public Health, Boston, MA
| | - Josée Dupuis
- Department of Biostatistics, Boston University School of Public Health, Boston, MA
- The National Heart Lung and Blood Institute’s Framingham Heart Study, Framingham, MA
| | - Mizuki Nishino
- Department of Radiology, Center for Pulmonary Functional Imaging, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Yoshitake Yamada
- Department of Radiology, Center for Pulmonary Functional Imaging, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
- Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan
| | - George R. Washko
- The Pulmonary and Critical Care Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - David C. Christiani
- Department of Environmental Health, Harvard School of Public Health, Boston, MA
| | - Noriyuki Tomiyama
- Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - George T. O’Connor
- The National Heart Lung and Blood Institute’s Framingham Heart Study, Framingham, MA
- Pulmonary Center and Department of Medicine, Boston University School of Medicine, Boston, MA
| | - Gary M. Hunninghake
- The Pulmonary and Critical Care Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Hiroto Hatabu
- Department of Radiology, Center for Pulmonary Functional Imaging, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| |
Collapse
|
2
|
de Fonseka D, Edey A, Stadon L, Viner J, Darby M, Maskell NA. The physiological consequences of different distributions of diffuse pleural thickening on CT imaging. Br J Radiol 2017; 90:20170218. [PMID: 28707542 DOI: 10.1259/bjr.20170218] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Diffuse pleural thickening (DPT) refers to extensive visceral pleural fibrosis with adhesion formation to the parietal pleura obliterating the pleural space. The radiological definition of DPT remains controversial with most of the literature requiring the presence of an obliterated costophrenic angle (CPA) for defining DPT. We conducted a study to investigate the variable distributions of DPT and associated lung function deficit. METHODS 85 patients referred to a pleural clinic with suspected pleural thickening were screened for our study. Data were collected from 37 patients with DPT confirmed on CT by size criteria (≥3 mm thick, ≥5 cm wide and ≥8 cm in length), and 21 controls with pleural plaques but no other pleuroparenchymal pathology. 27 patients were excluded. Groups were matched to age, body mass index and smoking history. RESULTS The percentage of predicted forced vital capacity showed a gradual decline from 98.9% for the control group to 83.5% in the DPT without CPA obliteration group (p < 0.05), to 79.5% in the unilateral DPT group (p < 0.001) and 66.7% in the bilateral group (p < 0.001). Similar reductions were seen in the percentage of predicted total lung capacity in the DPT with no CPA obliteration group and the bilateral DPT group. CONCLUSION Our study shows an incremental reduction in the forced vital capacity and total lung capacity in DPT without CPA obliteration, unilateral and bilateral DPT when compared with a matched control group. Advances in knowledge: Different distributions of DPT including no CPA obliteration can cause respiratory impairment, with bilateral DPT being the worst affected.
Collapse
Affiliation(s)
| | - Anthony Edey
- 2 Radiology Department, North Bristol NHS Trust, Southmead Hospital , Bristol , UK
| | - Louise Stadon
- 3 Academic Respiratory Unit, North Bristol NHS Trust , Bristol , UK
| | - Jason Viner
- 4 Respiratory Physiology, North Bristol NHS Trust , Bristol , UK
| | - Michael Darby
- 2 Radiology Department, North Bristol NHS Trust, Southmead Hospital , Bristol , UK
| | - Nick A Maskell
- 1 Academic Respiratory Unit, University of Bristol , Bristol , UK
| |
Collapse
|
3
|
Kopylev L, Christensen KY, Brown JS, Cooper GS. A systematic review of the association between pleural plaques and changes in lung function. Occup Environ Med 2014; 72:606-14. [PMID: 25504898 PMCID: PMC4687690 DOI: 10.1136/oemed-2014-102468] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 11/18/2014] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To conduct a systematic review of changes in lung function in relation to presence of pleural plaques in asbestos-exposed populations. METHODS Database searches of PubMed and Web of Science were supplemented by review of papers' reference lists and journals' tables of contents. Methodological features (eg, consideration of potential confounding by smoking) of identified articles were reviewed by ≥ two reviewers. Meta-analyses of 20 studies estimated a summary effect of the decrements in per cent predicted (%pred) forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) associated with presence of pleural plaques. RESULTS Among asbestos-exposed workers, the presence of pleural plaques was associated with statistically significant decrements in FVC (4.09%pred, 95% CI 2.31 to 5.86) and FEV1 (1.99%pred, 95% CI 0.22 to 3.77). Effects of similar magnitude were seen when stratifying by imaging type (X-ray or high-resolution CT) and when excluding studies with potential methodological limitations. Undetected asbestosis was considered as an unlikely explanation of the observed decrements. Several studies provided evidence of an association between size of pleural plaques and degree of pulmonary decrease, and presence of pleural plaques and increased rate or degree of pulmonary impairment. CONCLUSIONS The presence of pleural plaques is associated with a small, but statistically significant mean difference in FVC and FEV1 in comparison to asbestos-exposed individuals without plaques or other abnormalities. From a public health perspective, small group mean decrements in lung function coupled with an increased rate of decline in lung function of the exposed population may be consequential.
Collapse
Affiliation(s)
- Leonid Kopylev
- National Center for Environmental Assessment, Office of Research and Development, United States Environmental Protection Agency, Washington DC, USA
| | - Krista Yorita Christensen
- National Center for Environmental Assessment, Office of Research and Development, United States Environmental Protection Agency, Washington DC, USA
| | - James S Brown
- National Center for Environmental Assessment, Office of Research and Development, United States Environmental Protection Agency, Washington DC, USA
| | - Glinda S Cooper
- National Center for Environmental Assessment, Office of Research and Development, United States Environmental Protection Agency, Washington DC, USA
| |
Collapse
|
4
|
Ameille J. Les différentes pathologies pleuropulmonaires liées à l’amiante : définitions, épidémiologie et évolution. Rev Mal Respir 2012; 29:1035-46. [DOI: 10.1016/j.rmr.2012.02.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 02/17/2012] [Indexed: 01/09/2023]
|
5
|
Wilken D, Garrido MV, Manuwald U, Baur X. Lung function in asbestos-exposed workers, a systematic review and meta-analysis. J Occup Med Toxicol 2011; 6:21. [PMID: 21791077 PMCID: PMC3164601 DOI: 10.1186/1745-6673-6-21] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 07/26/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A continuing controversy exists about whether, asbestos exposure is associated with significant lung function impairments when major radiological abnormalities are lacking. We conducted a systematic review and meta-analysis in order to assess whether asbestos exposure is related to impairment of lung function parameters independently of the radiological findings. METHODS MEDLINE was searched from its inception up to April 2010. We included studies that assessed lung function parameters in asbestos exposed workers and stratified subjects according to radiological findings. Estimates of VC, FEV1 and FEV1/VC with their dispersion measures were extracted and pooled. RESULTS Our meta-analysis with data from 9,921 workers exposed to asbestos demonstrates a statistically significant reduction in VC, FEV1 and FEV1/VC, even in those workers without radiological changes. Less severe lung function impairments are detected if the diagnoses are based on (high resolution) computed tomography rather than the less sensitive X-ray images. The degree of lung function impairment was partly related to the proportion of smokers included in the studies. CONCLUSIONS Asbestos exposure is related to restrictive and obstructive lung function impairment. Even in the absence of radiological evidence of parenchymal or pleural diseases there is a trend for functional impairment.
Collapse
Affiliation(s)
- Dennis Wilken
- Institute for Occupational and Maritime Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marcial Velasco Garrido
- Institute for Occupational and Maritime Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ulf Manuwald
- Institute for Occupational and Maritime Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Xaver Baur
- Institute for Occupational and Maritime Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
6
|
Ferretti G. [What are the tools for post-occupational follow-up, how should they be performed and what are their performance, limits and benefit/risk ratio? Chest X-Ray and CT scan]. Rev Mal Respir 2011; 28:761-72. [PMID: 21742237 DOI: 10.1016/j.rmr.2011.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 02/17/2011] [Indexed: 10/18/2022]
Abstract
Chest radiography and computed tomography (CT) are the two radiological techniques used for the follow-up of people exposed to asbestos. Since the last conference of consensus (1999), the scientific literature has primarily covered high-resolution CT and high-resolution volume CT (HR-VCT). We consider in turn the contribution of digital thoracic radiography, recommendations for the performance of HR-VCT to ensure the quality of examination while controlling the delivered radiation dose, and the need to refer to the "CT atlas of benign diseases related to asbestos exposure", published by a group of French experts in 2007, for interpretation. The results of the published studies concerning radiography or CT are then reviewed. We note the great interobserver variability in the recognition of pleural plaques and asbestosis, indicating the need for adequate training of radiologists, and the importance of defining standardized, quantified criteria for CT abnormalities. The very low agreement between thoracic and general radiologists must be taken into account. The reading of CT scans in cases of occupational exposure to asbestos should be entrusted to thoracic radiologists or to general radiologists having validated specific training. A double interpretation of CT could be considered in medicosocial requests. CT is more sensitive than chest radiography in the detection of bronchial carcinoma but generates a great number of false positive results (96 to 99%). No scientific data are available to assess the role of imaging by either CT or chest radiography in the early detection of mesothelioma.
Collapse
Affiliation(s)
- G Ferretti
- Université J-Fourrier, BP 53, 38041 Grenoble cedex 9, France.
| |
Collapse
|
7
|
Ferretti G. [Exposure to asbestos : radiography and chest CT]. JOURNAL DE RADIOLOGIE 2011; 92:450-60. [PMID: 21621114 DOI: 10.1016/j.jradio.2011.03.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 03/31/2011] [Indexed: 12/21/2022]
Affiliation(s)
- G Ferretti
- Université J.-Fourrier, Grenoble, France.
| |
Collapse
|
8
|
Computed tomography for diagnosis and grading of dust-induced occupational lung disease. Curr Opin Pulm Med 2008; 14:135-40. [DOI: 10.1097/mcp.0b013e3282f5248e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
9
|
|
10
|
Abstract
Imaging plays an important role in the diagnosis and subsequent management of patients with pleural disease. The presence of a pleural abnormality is usually suggested following a routine chest x-ray, with a number of imaging modalities available for further characterization. This article describes the radiographic and cross-sectional appearances of pleural diseases, which are commonly encountered in every day practice. The conditions covered include benign and malignant pleural thickening, pleural effusions, empyema and pneumothoraces. The relative merits of CT, MRI and PET in the assessment of these conditions and the role of image-guided intervention are discussed.
Collapse
Affiliation(s)
- Nagmi R Qureshi
- Department of Radiology, Churchill Hospital, Headington, Oxford OX3 7LJ, UK.
| | | |
Collapse
|
11
|
Ameille J, Descatha A. [Screening for benign pleural disease in adults: why and how?]. REVUE DE PNEUMOLOGIE CLINIQUE 2006; 62:89-92. [PMID: 16670661 DOI: 10.1016/s0761-8417(06)75421-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Benign diseases of the pleura are clearly dominated by asbestos-related conditions. It is important to distinguish diseases affecting the parietal pleura (pleural plaques) and those affecting the visceral pleura (pleurisy and diffuse thickening). The social benefits which could be obtained by identifying affected persons warrants screening in France, even more so than non-demonstrated medical benefits. Thoracic computed tomography without contrast is the examination of choice. A rigorous protocol is required for proper execution and interpretation.
Collapse
Affiliation(s)
- J Ameille
- Unité de Pathologie Professionnelle, de Santé au Travail et d'Insertion, Hôpital Raymond-Poincaré, AP-HP, 104, boulevard Raymond-Poincaré, 92380 Garches.
| | | |
Collapse
|