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1/8/2009
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| A case-control study on pleural malignant mesothelioma (MM) was
conducted in Casale Monferrato, where the largest Italian
asbestos cement (AC) factory had been operating from 1907 to 1985. In
a previous study we observed a five to seven-fold
increase in the incidence of MM among people living in that city and
never employed in the factory mentioned. The present
study includes cases of MM with histological diagnosis over the
period 1.1.1987-30.6.1993 among residents in the Local
Health Unit (LHU) of Casale Monferrato. Population controls were
randomly extracted from the list of the residents in the
LHU, matched to cases on , date of birth, vital status and date of
death. Cases and controls (or their closest relative) were
interviewed with a standardised questionnaire focusing on asbestos
exposure in the (life-long) residential and occupational
histories and in leisure time activities as well as on occupational
a. |
| One hundred and seventy malignant pleural mesotheliomas seen at
necropsy at the Institute of Pathological Anatomy of the
Trieste University during the period 1968-1987 were reviewed. The
series included 153 men and 17 women, aged between 33
and 92 years (median 70 years). Lifetime work histories were obtained
from the patients relatives by personal or telephone
interviews in 162 cases. A majority of the male subjects had been
employed in naval work, 99 people having worked in the
ship-building industry, 19 in the navy and merchant marine, and 7 in
docks. A variety of trades appeared in the remaining
histories. Work histories were indicative of occupational exposure to
asbestos in 150 cases. A further 5 patients with negative
or insufficient data showed asbestos bodies in routine lung sections
and 5 women had a history of domestic exposure. A
majority of the patients had had their first exposure before 1950.
The. |
| The analysis of 335 cases of mesothelioma observed at the Ramazzini
Foundation and the Bologna Institute of Oncology has
shown: 1) a high percentage of correlation of these tumours with
asbestos exposure; 2) a large number of population categories
potentially exposed to asbestos fibres and therefore at risk of
developing mesothelioma; and 3) the high risk of mesothelioma
among people exposed in various circumstances to asbestos used in
railroads and sugar refinery plants.
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Med Lav 1997 Jul-Aug;88(4):316-20 |
| We reviewed the certificates of 39,650 deaths which occurred in the
period 1975-1988 in Leghorn and of 45,900 in La Spezia
(Italy) in the period 1958-1988. In total 262 cases have been
recorded as pleural mesothelioma. The main occupational
exposures occurred in the shipbuilding industry. Regarding
non-occupational exposures to asbestos, 13 cases of mesothelioma
were found in women who had washed the work clothes of their
relatives at home; we also found other domestic uses of
asbestos which were rarely or never discussed previously in the
literature: six cases might be explained by the installation of
fireproof or non-conductive materials in the domestic environment.
These exposures probably are more frequent than realized until now.
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Am J Ind Med 1992;21(4):577-85 |
| Our 1990 article reported on recent papers in the peer-reviewed literature and
two international symposia, one at the International Agency for Research on
Cancer (2) and the other at Harvard University (3), all concluding that
chrysotile fibers are less active than amphibole types (crocidolite, amosite,
tremolite) of asbestos in the causation of mesothelioma in man. In his summary
of the IARC meeting, Sir Richard Doll, an eminent epidemiologist, concluded
there is the difference between the effects of chrysotile and amphiboles, which
is so great in relation to mesothelioma that it is possible to argue that
chrysotile does not cause mesothelioma at all (2). This observation has been
supported by numerous peer-reviewed papers and working groups subsequently
(4-6). |
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