Study on prevalence of pleural plaques in miniature X-ray films in Japan and Sweden.

Ohyagi, Shigeo; Kagamimori, Sadanobu; Hillerdal, Gunnar; Saitoh, Nobuteru; Hosoda, Yutaka; Shishido, Shinji; Iwai, Kuzuro

doi:10.2486/indhealth.23.127

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…The results of the present study suggest that the rates of asbestos-related radiographic changes in the general population, as reported previously from this cohort [Hilt et al, 1986b], and in other population surveys [Hillerdal, 1978;Ohyagi et al, 1985;Raunio, 19661, are more likely to be underestimated than overestimated. Even though a direct comparison between the two studies cannot be made with confidence, this suggestion is in contrast with results recently published by Reger et al [1990].…”

Section: Discussionsupporting

confidence: 62%

Chest radiographs in subjects with asbestos‐related abnormalities: Comparison between ilo categorizations and clinical reading

Hilt

Borgersen

Lien

et al. 1992

American J Industrial Med

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The findings of a previous chest X-ray screening, determined without using standardized criteria, were reassessed by means of the ILO classification. Of 470 radiographs that had been determined as showing asbestos-related changes, 430 were categorized according to the ILO Classification. Small opacities with profusion greater than or equal to 1/0 were described in 39 (52%) of 75 participants who, on the original clinical reading, had been determined as having lung fibrosis, and in 45 (12.7%) of 355 who were determined as having pleural changes only. When considering circumscribed pleural thickening at the chest wall or diaphragm, as categorized by the ILO Classification, such changes were present in 401 (93.7%) of 428 subjects with pleural changes as determined on the clinical reading. In addition to the improved sensitivity and specificity achieved, the ILO Classification also allows comparison with other studies. The most apparent disadvantage of the ILO system is that it cannot firmly separate the various types of asbestos-related pleural changes. The study revealed that the previous asbestos exposure of the case subjects had occurred in many different workplaces and occupations.

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Section: Discussionsupporting

confidence: 62%

Chest radiographs in subjects with asbestos‐related abnormalities: Comparison between ilo categorizations and clinical reading

Hilt

Borgersen

Lien

et al. 1992

American J Industrial Med

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“…Their prevalence increases at lower doses than the prevalence of small irregular opacities and diffuse pleural thickening [Neuberger, 19891. Recent studies reported a marked preponderance of pleural over parenchymal abnormalities in workers who used asbestos-containing products in their jobs [Lilis et al, 1980;Sprince et al, 1985;Lundorf et al, 1987;Fischbein et al, 1991;Becklake, 19911. Pleural plaques with no other asbestos-related abnormalities were also observed in general population surveys in men engaged in occupations with intermittent exposure as well as in individuals who had only household or environmental asbestos exposure [Ohyagi et al, 1985;Hillerdal, 19911. In studies of subjects with pleural plaques, asbestos exposure could not always be elicited from occupational histories.…”

Section: Introductionmentioning

confidence: 74%

Pleural plaques, asbestos exposure, and asbestos bodies in bronchoalveolar lavage fluid

Orlowski

Pairon

Ameille

et al. 1994

American J Industrial Med

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The profiles of occupational asbestos exposure were investigated in a series of 66 hospital patients in whom pleural plaques constituted the only asbestos-induced abnormality. The relationship between a radiological semiquantitative score of pleural plaques and indices of asbestos exposure was also examined. On the basis of a standardized occupational questionnaire, four classes of asbestos exposure were distinguished in our study population: no evidence of exposure, low-level exposure, sporadic exposure at higher levels, and a remaining group of individuals with substantial exposure. Asbestos body count in bronchoalveolar lavage fluid (BALF) was used as an objective indicator of cumulative lung retention of asbestos. Our results support the data indicating that pleural plaques may occur in subjects with low-level or sporadic asbestos exposure. Although it is admitted that pleural plaques are strongly associated with past asbestos exposure, our data suggest that the stage of pleural plaques was not correlated to the level, frequency, duration of exposure nor to the amount of asbestos bodies in the BALF in subjects free of any lung parenchymal abnormalities on high resolution computerized tomography.

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“…In this context, it is plausible that a widespread and heavy exposure to asbestos has involved large numbers of workers in Japan. Various studies conducted throughout the country on asbestos exposure markers (pleural plaques and lung asbestos bodies) have documented that such an exposure actually has occurred (Kimizuka and Hayashi, 1983;Ohyagi et al, 1985;Kohyama, 1989;Hiraoka et al, 1990;Shishido et al, 1990;Horii et al, 1992;Kishimoto, 1992;Tamura et al, 1992;Yano et al, 1993;Murai et al, 1995;Murai et al, 1997). In particular, various investigations showed the high level of asbestos exposure in the Japanese shipyards (Kishimoto et al, 1989;Natori et al, 1998;Kurumatani et al, 1999).…”

Section: Malignant Mesothelioma In Eastern Asiamentioning

confidence: 99%

Malignant Mesothelioma in Eastern Asia

Bianchi¹,

Bianchi²

2012

Asian Pacific Journal of Cancer Prevention

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Relatively low numbers of malignant mesotheliomas have been reported from Eastern Asia. In order to explore the causes of this fact, the available data on mesothelioma incidence/mortality in five countries (Japan, South Korea, Taiwan, Hong Kong, and Singapore) were reviewed. Data on the industrial histories of the above countries were also examined. Mesothelioma incidence was low, despite a history of high shipbuilding and port activities, in which heavy exposure to asbestos generally has occurred. Underestimation of mesothelioma could partly explain the above discrepancy. Moreover, in some areas a sufficient latency period for mesothelioma development may have not yet elapsed, due to recent industrialization. However, other possibilities have to be considered. The cancer epidemiology in Eastern Asia differs deeply from that seen in Western countries, an indication of differences in etiologic factors of cancer as well as in co-factors. In addition, the oncogenic spectrum of asbestos is wide, and not completely defined. In a very different milieu from that of Western countries, asbestos could preferentially hit targets other than serosal membranes.

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Study on prevalence of pleural plaques in miniature X-ray films in Japan and Sweden.

Cited by 6 publications

References 6 publications

Chest radiographs in subjects with asbestos‐related abnormalities: Comparison between ilo categorizations and clinical reading

Chest radiographs in subjects with asbestos‐related abnormalities: Comparison between ilo categorizations and clinical reading

Pleural plaques, asbestos exposure, and asbestos bodies in bronchoalveolar lavage fluid

Malignant Mesothelioma in Eastern Asia

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