Descendant of asbestos pioneer calls for end to Canada’s involvement in its trade

Quoted from http://www.montrealgazette.com/business/Descendant+asbestos+pioneer+calls+Canada+involvement+trade/6036063/story.html

Descendant of asbestos pioneer calls for end to Canada’s involvement in its trade

By Michelle Lalonde, Postmedia News January 23, 2012

MONTREAL — A descendant of one of the earliest pioneers of Quebec’s storied asbestos industry has publicly joined the movement to stop Canadian production and export of the deadly mineral.

Susan Henry of Vancouver is the great-great niece of Andrew Stuart Johnson, a farmer who in 1878 founded the Johnson Mine Company in Thetford Mines, the first asbestos mine to operate in Canada.

After opening his mine, Johnson served as mayor of Thetford Mines and then as a Conservative member of the Quebec legislature until 1892, no doubt promoting his industry as vigorously as politicians from the region continue to do today.

Despite her family’s history, Henry has now put her name to a letter-writing campaign, launched by the David Suzuki Foundation in November, calling for an end to Canada’s involvement in the asbestos trade.

[Article continues at original source]

Lung cancer mortality in North Carolina and South Carolina chrysotile asbestos textile workers

Quoted from http://oem.bmj.com/content/early/2012/01/20/oemed-2011-100229.abstract


Occupational and Environmental Medicine

Lung cancer mortality in North Carolina and South Carolina chrysotile asbestos textile workers

  • Accepted 9 December 2011
  • Published Online First 20 January 2012

Abstract

Objectives Studies of workers in two US cohorts of asbestos textile workers exposed to chrysotile (North Carolina (NC) and South Carolina (SC)) found increasing risk of lung cancer mortality with cumulative fibre exposure. However, the risk appeared to increase more steeply in SC, possibly due to differences in study methods. The authors conducted pooled analyses of the cohorts and investigated the exposure-disease relationship using uniform cohort inclusion criteria and statistical methods.

Methods Workers were included after 30days of employment in a production job during qualifying years, and vital status ascertained through 2003 (2001 for SC). Poisson regression was used to estimate the exposure-response relationship between asbestos and lung cancer, using both exponential and linear relative rate models adjusted for age, sex, race, birth cohort and decade of follow-up.

Results The cohort included 6136 workers, contributing 218?631 person-years of observation and 3356 deaths. Cumulative exposures at the four study facilities varied considerably. The pooled relative rate for lung cancer, comparing 100f-yr/ml to 0f-yr/ml, was 1.11 (95% CI 1.06 to 1.16) for the combined cohort, with different effects in the NC cohort (RR=1.10, 95% CI 1.03 to 1.16) and the SC cohort (RR=1.67, 95% CI 1.44 to 1.93).

Conclusions Increased rates of lung cancer were significantly associated with cumulative fibre exposure overall and in both the Carolina asbestos-textile cohorts. Previously reported differences in exposure-response between the cohorts do not appear to be related to inclusion criteria or analytical methods.

 

Epithelial Malignant Pleural Mesothelioma After Extrapleural Pneumonectomy: Stratification of Survival With CT-Derived Tumor Volume

Quoted from http://www.ajronline.org/content/198/2/359.abstract

Epithelial Malignant Pleural Mesothelioma After Extrapleural Pneumonectomy: Stratification of Survival With CT-Derived Tumor Volume

Abstract

 

OBJECTIVE. The purpose of this study was to assess the usefulness of CT-derived tumor volume, with control for other prognostic factors, for stratifying survival after surgery-based multimodality treatment of a large cohort of patients with epithelial malignant pleural mesothelioma.

MATERIALS AND METHODS. We retrospectively reviewed 338 patients with mesothelioma who underwent extrapleural pneumonectomy between 2001 and 2007. The study cohort comprised 88 patients with epithelial subtype tumors, DICOM-format CT scans, and data regarding neoadjuvant and adjuvant therapy. Tumor volume was calculated, and Kaplan-Meier survival and Cox regression analyses were performed to compare the estimated survival functions of patient subgroups based on volume and other covariates related to outcome (sex, age, preoperative platelet count, hemoglobin concentration, WBC count, clinical and pathologic TNM category, and administration of neoadjuvant and adjuvant therapy). A multivariate regression model was derived on the basis of the most significant univariate predictors.

RESULTS. The median estimated tumor volume was 319 cm3 (range, 4–3256 cm3). In univariate analysis, tumor volume, hemoglobin concentration, platelet count, pathologic TNM category, and administration of adjuvant chemotherapy or radiation therapy met the criteria for inclusion in the reverse stepwise regression analysis. In the final model, tumor volume, hemoglobin concentration, and administration of adjuvant chemotherapy or radiotherapy were identified as independently associated with overall survival.

CONCLUSION. With control of prognostic covariates, CT-derived tumor volume can be used to stratify survival of patients with epithelial mesothelioma after extrapleural pneumonectomy and should be included in prognostic evaluation of patients for whom resection is being considered.

The asbestos disease epidemic: here today, here tomorrow — Cullinan and Pearce 67 (2): 98 — Thorax

Quoted from http://thorax.bmj.com/content/67/2/98.extract

The asbestos disease epidemic: here today, here tomorrow

 

Thorax 2012;67:98-99 doi:10.1136/thoraxjnl-2011-201180

  • Editorial

  1. Paul Cullinan1,
  2. Neil Pearce2

+ Author Affiliations

  1. 1Department of Occupational and Environmental Medicine, National Heart and Lung Institute, London, UK
  2. 2Epidemiology and Public Health, London School of Hygiene and Tropical Medicine, London, UK
  1. Correspondence to Dr Paul Cullinan, Department of Occupational and Environmental Medicine, National Heart and Lung Institute, 1b Manresa Road, London SW3 6LR, UK; p.cullinan@imperial.ac.uk

 

In what may be the best ever use of a Wellcome grant, Geoffrey Tweedale, in his fascinating history of the multinational asbestos company Turner & Newall,1 reminds us that asbestos was once known as the ‘magic mineral’. Indeed, in many ways, it is the ideal construction material: tough, durable, light in weight, fire-resistant and very cheap. Unfortunately, asbestos is also, as every respiratory physician knows, highly toxic when inhaled. Total bans on its use are in place in 52 countries including those of the European Union, Australia, Japan and South Africa2; and its use is tightly restricted in the USA, New Zealand and Canada—the last, ironically, among the world’s largest exporters of the material.

Readers from these countries may be surprised to learn that elsewhere the production, sale and use of asbestos continue to flourish and even increase. In 1994, one of us (NP) edited a book3 on occupational cancer in developing countries for the International Agency for Research on Cancer and reported that global asbestos production and use had not declined; rather, the problem was simply being moved from Western countries to emergent economies. Unhappily, the situation has not improved in the intervening 17years. In India, for example, the use of asbestos has doubled in the last decade to about 300?000 tonnes a year by an industry that now employs an estimated 100?000 workers.4 Other major users include China, Brazil, Russia, Ukraine, Kazakhstan and Indonesia. In these parts of the world, where occupational exposures may be difficult to control and enforce, the great majority of asbestos …

[Full text of this article]

Asbestos-Related Diseases in Automobile Mechanics

Quoted from http://annhyg.oxfordjournals.org/content/56/1/55.abstract

Asbestos-Related Diseases in Automobile Mechanics

Abstract

 

Purpose: Automobile mechanics have been exposed to asbestos in the past, mainly due to the presence of chrysotile asbestos in brakes and clutches. Despite the large number of automobile mechanics, little is known about the non-malignant respiratory diseases observed in this population. The aim of this retrospective multicenter study was to analyse the frequency of pleural and parenchymal abnormalities on high-resolution computed tomography (HRCT) in a population of automobile mechanics.

Methods: The study population consisted of 103 automobile mechanics with no other source of occupational exposure to asbestos, referred to three occupational health departments in the Paris area for systematic screening of asbestos-related diseases. All subjects were examined by HRCT and all images were reviewed separately by two independent readers; who in the case of disagreement discussed until they reached agreement. Multiple logistic regression models were constructed to investigate factors associated with pleural plaques.

Results: Pleural plaques were observed in five cases (4.9%) and interstitial abnormalities consistent with asbestosis were observed in one case. After adjustment for age, smoking status, and a history of non-asbestos-related respiratory diseases, multiple logistic regression models showed a significant association between the duration of exposure to asbestos and pleural plaques.

Conclusions: The asbestos exposure experienced by automobile mechanics may lead to pleural plaques. The low prevalence of non-malignant asbestos-related diseases, using a very sensitive diagnostic tool, is in favor of a low cumulative exposure to asbestos in this population of workers.

Asbestos Fibre Burden in the Lungs of Patients with Mesothelioma Who Lived Near Asbestos-Cement Factories

Quoted from http://annhyg.oxfordjournals.org/content/early/2012/01/12/annhyg.mer126.abstract

Asbestos Fibre Burden in the Lungs of Patients with Mesothelioma Who Lived Near Asbestos-Cement Factories

Abstract

 

Background Epidemics of malignant mesothelioma are occurring among inhabitants of Casale Monferrato and Bari never employed in the local asbestos-cement (AC) factories. The mesothelioma risk increased with proximity of residence to both plants.

Objectives To provide information on the intensity of environmental asbestos exposure, in the general population living around these factories, through the evaluation of the lung fibre burden in mesothelioma patients.

Methods We analysed by a scanning electron microscope equipped with X-ray microanalysis wet (formalin-fixed) lung tissue samples from eight mesothelioma patients who lived in Casale Monferrato or Bari and underwent surgery. Their occupational and residential history was obtained during face-to-face interviews. Semi-quantitative and quantitative indices of cumulative environmental exposure to asbestos were computed, based on residential distance from the AC plants and duration of stay.

Results The lung fibre burden ranged from 110?000 to 4?300?000 fibres per gram of dry lung (f/g) and was >1?000?000 f/g in three subjects. In four cases, only amphibole fibres were detected. Environmental exposures had ceased at least 10 years before samples were taken. No patient had other definite or probable asbestos exposures. A linear relationship was observed between the lung fibre burden and all three indices of environmental cumulative exposure to asbestos.

Conclusions Environmental exposure to a mixture of asbestos fibres may lead to a high lung fibre burden of amphiboles years after exposure cessation. The epidemiological evidence of an increased mesothelioma risk for the general population of Casale Monferrato and Bari, associated with asbestos contamination of the living environment, is corroborated.

Asbestos victims get cash boost

Quoted from http://www.heraldsun.com.au/news/breaking-news/asbestos-victims-get-cash-boost/story-e6frf7kf-1226243527082

Asbestos victims get cash boost

  • From: AAP
  • January 13, 2012 1:22PM

A MULTI-million dollar injection of funding for asbestos victims will make New South Wales a world leader in the treatment of mesothelioma, a cancer specialist says.

The NSW Government today announced the Asbestos Diseases Research Institute would receive $3.5 million to improve outcomes for people with asbestos-related cancer and their families.

The money comes from the State Government’s translational cancer research program, which will also award $3.47 million to researchers working on the diagnosis and treatment of blood cancers.

Chief Cancer Officer and CEO of the Cancer Institute of NSW Professor David Currow says the translational cancer grants will benefit cancer patients across the state.

Australia had the world’s highest incidence of malignant mesothelioma, a fatal cancer caused by asbestos, Professor Currow said in a statement today.

[Article continues at original source]

Malignant Pleural Mesothelioma

Quoted from http://www.jnccn.org/content/10/1/26.extract

Malignant Pleural Mesothelioma

NOTE:  Since this article has no abstract, we have provided an extract of the first 250 words of the full text.

Overview

Mesothelioma is a rare cancer that is estimated to occur in approximately 2500 people in the United States every year.1,2 These NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) focus on malignant pleural mesothelioma (MPM), which is the most common type; mesothelioma can also occur in other sites (e.g., peritoneum, pericardium, tunica vaginalis testis). The disease is difficult to treat.

NCCN Clinical Practice Guidelines in Oncology for Malignant Pleural Mesothelioma

NCCN Categories of Evidence and Consensus

Category 1: Based upon high-level evidence, there is uniform NCCN consensus that the intervention is appropriate.

Category 2A: Based upon lower-level evidence, there is uniform NCCN consensus that the intervention is appropriate.

Category 2B: Based upon lower-level evidence, there is NCCN consensus that the intervention is appropriate.

Category 3: Based upon any level of evidence, there is major NCCN disagreement that the intervention is appropriate.

All recommendations are category 2A unless otherwise noted.

Clinical trials: NCCN believes that the best management for any cancer patient is in a clinical trial. Participation in clinical trials is especially encouraged. median overall survival is only approximately 1 year. MPM occurs mainly in older men (median age, 72 years) who have been exposed to asbestos, although it occurs decades after exposure (20-40 years later).3,4

The incidence of MPM is leveling off in the United States, because asbestos use has decreased since the 1970s; however, the United States still has more cases than anywhere else in the world.5,6 Although asbestos is no longer mined in the United States, it is still imported.6 The incidence of MPM is increasing in other countries, such as Russia, Western Europe, China, and India.1,5,7-11 Mortality rates from MPM are highest in the United Kingdom, Netherlands, and Australia, and are increasing in several other countries, such as Japan, Argentina, and Brazil.7

[Full Text of this Article]

Union Carbide Asbestos Verdict Erased by Mississippi Judge

Quoted from http://www.bloomberg.com/news/2012-01-03/union-carbide-asbestos-verdict-overturned-by-mississippi-court.html

Union Carbide Asbestos Verdict Erased by Mississippi Judge

By Laurence Viele Davidson – Jan 3, 2012 4:31 PM ET

A $322 million jury verdict in an asbestos case against Dow Chemical Co. (DOW)’s Union Carbide unit and Chevron Phillips Chemical Co. was overturned by a Mississippi judge.

The companies asked the state Supreme Court to overturn the verdict, saying Smith County Circuit Judge Eddie Bowen had a conflict of interest because his parents had asbestos legal claims, including one against Union Carbide.

The state’s high court removed Bowen from the case last year. His replacement, Special Judge William F. Coleman, said on Dec. 22 that the companies’ request to remove Bowen and vacate the verdict were “well taken and should be granted.”

The May 4, 2011 verdict was the largest ever made to a single asbestos case plaintiff, according to data compiled by Bloomberg. State punitive-damages restrictions would have reduced the verdict by at least $260 million. Coleman’s order doesn’t include information on a new trial. The jury award was the ninth-largest in the U.S. overall in 2011, according to Bloomberg data.

[Article continues at original source]

A breath test for malignant mesothelioma using an electronic nose

Quoted from http://erj.ersjournals.com/content/early/2011/12/16/09031936.00040911.abstract

A breath test for malignant mesothelioma using an electronic nose

Abstract

Malignant mesothelioma (MM) is a rare tumour usually caused by asbestos exposure. MM is difficult to diagnose in its early stages and is invariably fatal. Earlier detection of MM could potentially improve survival. Exhaled breath sampling of volatile organic compounds (VOCs) using a carbon polymer array (CPA) electronic nose recognises specific breath profiles characteristic of different diseases. VOC breath profiling can distinguish between patients with lung cancer and controls, but there is only one prior report in MM, and the potential confounding effect of other asbestos-related diseases was not highlighted.

A CPA electronic nose will distinguish patients with MM from those with benign asbestos-related diseases (ARDs) and normal subjects with high sensitivity and specificity.

Eighty patients (MM n=20, ARDs n=18, controls n=42) participated in a cross-sectional, case control study. Breath samples were analysed using the Cyranose 320, using canonical discriminant analysis and principal component reduction. Repeatability was assessed by evaluating the samples in duplicate.

20 MM, 18 ARDs and 42 control subjects could be distinguished by their breath profiles. 10 MM subjects created the training set. Smellprints from 10 new MM patients were distinguished from control subjects with an accuracy of 95%. Patients with MM, ARDs and control subjects were correctly identified in 88% of cases.

Exhaled breath VOC profiling can accurately distinguish between patients with MM, ARDs and healthy controls. The CPA eNOSE is a novel method for distinguishing patients with MM. This could eventually translate into a screening tool for high risk populations.

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