Further analyses of the evolutionary characteristics of a sequentially studied human malignant mesothelioma

Our plain-English summary of Further analyses of the evolutionary characteristics of a sequentially studied human malignant mesothelioma, by J. Mark, K. Olofsson, T. Månsson, et al (Hereditas, 1989).

The study

• Authors: J. Mark, K. Olofsson, T. Månsson, G. Stenman
• Journal: Hereditas
• Published: 1989;110(1):85-6
• Type of article: Case report
• Cited by: 2 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

In plain English

This brief report followed up one patient, described as exposed to asbestos, whose malignant pleural mesothelioma the same group had studied earlier (case 1 in a 1986 report). The authors examined chromosomes in tumor cells grown in the laboratory from right-sided chest fluid at two further time points, 30 and 90 days after the previous sample. The patient died two months after the last sample. Autopsy confirmed malignant pleural mesothelioma that had spread widely in the chest. In both samples, the main group of cells had near-normal chromosome numbers. These cells seldom were identical but usually shared the same set of altered chromosomes. Some cells had normal chromosomes (two in preparation 7, nine in preparation 8), and four new variant cells were found. The authors concluded that the main cell population stayed chromosomally unstable even late in the disease, and that new, unrelated variant cells kept arising. Citing other cases and unpublished experiments, they wrote that asbestos seems to play a key role in this unusual pattern.

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: Brief report; follow-up of sequential chromosome (G-banding karyotype) analyses of one patient's tumor cells, using two further cultured preparations
• Who was studied: One patient (case 1 of an earlier 1986 report by the same group) with malignant pleural mesothelioma, confirmed at autopsy; Skövde and Gothenburg, Sweden
• Exposure: The patient was described as exposed to asbestos; no fiber type, job or dose is given
• Main results:
  • Autopsy showed that the originally left-sided tumor had infiltrated wide areas of the left lung and spread to the right pleural cavity
  • Preparations 7 and 8 both showed a diploid to near-diploid main (modal) cell population in which cells seldom were identical but usually shared the same marker chromosomes
  • Cells with a normal karyotype were found: two in preparation 7 and nine in preparation 8
  • Four further variant cells were seen: one in preparation 7 and three in preparation 8
  • In the authors' interpretation, newly generated variant cells lacked a clonal relationship to the main cell population
• The authors' conclusion: The authors concluded that mesotheliomas often show long-lasting chromosomal instability of the main cell population, with no definite stemline even in advanced stages, and that new unrelated variant cells keep arising even late. Citing two other cases and unpublished experiments on normal cells exposed to asbestos, they wrote that asbestos seems to play a key role in this unusual pattern.

Topics

The National Library of Medicine indexes this study under subjects our site covers: Mesothelioma.

Medical terms in this study, explained in our Lexicon: Malignant Mesothelioma.

Related studies

• Chromosomes and chromosomal evolution in human mesotheliomas as reflected in sequential analyses of two cases — G. Stenman, K. Olofsson, et al. (1986)
• Specificity of asbestos-induced chromosomal aberrations in short-term cultured human mesothelial cells — K. Olofsson, J. Mark (1989)
• Abnormalities of chromosomes 7 and 22 in human malignant pleural mesothelioma: correlation between Southern blot and cytogenetic analyses — M. Tiainen, J. Kere, et al. (1992)
• Malignant mesothelioma: clinical characteristics, asbestos mineralogy and chromosomal abnormalities of 41 patients — L. Tammilehto, T. Tuomi, et al. (1992)
• Cytogenetic analysis of malignant mesothelioma — A. Hagemeijer, M.A. Versnel, et al. (1990)
• Cytogenetic findings in an effusion secondary from pleural mesothelioma — M.J. Bello, J.A. Rey, et al. (1987)

Browse return to medical research.