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European Journal of Nuclear Medicine and Molecular Imaging

Published in:

01-02-2005 | Original Article

Evidence of increased chromosomal abnormalities in French Polynesian thyroid cancer patients

Authors: D. Violot, R. M’kacher, E. Adjadj, J. Dossou, F. de Vathaire, C. Parmentier

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 2/2005

Abstract

Purpose

The aim of this study was to evaluate the frequency of chromosomal abnormalities in thyroid cancer patients before and after radioactive iodine administration in order to assess cytogenetic particularity in Polynesian thyroid cancer patients.

Methods

Chromosomal abnormalities were studied in 30 Polynesian patients with differentiated thyroid cancer, prior to and 4 days after¹³¹I administration. Unstable chromosomal abnormalities were counted in peripheral blood lymphocytes using a conventional cytogenetic method. Peripheral blood was irradiated in vitro at different doses (0.5, 1 and 2 Gy) in order to establish the dose-response of the lymphocytes. Control groups were composed of 50 European thyroid cancer patients before and after first administration of¹³¹I, and of ten European healthy donors. In addition, in vitro irradiation assays were performed at different doses (0.5, 1 and 2 Gy).

Results

The relative risk of spontaneous dicentrics before any radiation treatment was 2.9 (95% CI 1.7–5.1) times higher among Polynesian thyroid patients than among European thyroid cancer patients. After in vitro irradiation, the rise in frequency of dicentrics was similar in the Polynesian thyroid cancer group and the European thyroid patients and healthy donors. Four days after administration of 3.7 GBq¹³¹I, the relative risk for a dicentric per cell was 1.3 (95% CI 1.0–1.5) times higher in Polynesian than in European patients. This can be explained by higher¹³¹I retention in Polynesian compared with European patients. The results obtained revealed an increased frequency of cytogenetic abnormalities in Polynesian thyroid cancer patients compared with European control patients.

Conclusion

These preliminary findings are compatible with possible previous environmental aggression and therefore imply a need for further investigations on larger series including, in particular, French Polynesian healthy donors. In addition to French Polynesians, Maori and Hawaiian control groups could be useful.

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Title: Evidence of increased chromosomal abnormalities in French Polynesian thyroid cancer patients
Authors: D. Violot
R. M’kacher
E. Adjadj
J. Dossou
F. de Vathaire
C. Parmentier
Publication date: 01-02-2005
Publisher: Springer-Verlag
Published in: European Journal of Nuclear Medicine and Molecular Imaging / Issue 2/2005
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI: https://doi.org/10.1007/s00259-004-1662-2

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Springer Medicine

Evidence of increased chromosomal abnormalities in French Polynesian thyroid cancer patients

Abstract

Purpose

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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