Volume 93, Issue 2 pp. 288-293
Research Article

Cancer risk in heterozygotes for ataxia-telangiectasia

Béatrice Geoffroy-Perez

Béatrice Geoffroy-Perez

U521 INSERM, Institut Gustave Roussy, Villejuif, France

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Nicolas Janin

Nicolas Janin

Institut Gustave Roussy, Villejuif, France

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Katia Ossian

Katia Ossian

Institut Gustave Roussy, Villejuif, France

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Anthony Laugé

Anthony Laugé

Laboratoire de pathologie moléculaire des cancers, Unité de Génétique Oncologique, Institut Curie, Paris, France

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Marie-Françoise Croquette

Marie-Françoise Croquette

Centre Hospitalier Feron-Vrau, Lille, France

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Claude Griscelli

Claude Griscelli

Service d'Immuno-Hematologie pédiatrique, Hôpital des Enfants Malades, Paris, France

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Marianne Debré

Marianne Debré

Service d'Immuno-Hematologie pédiatrique, Hôpital des Enfants Malades, Paris, France

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Brigitte Bressac-de-Paillerets

Brigitte Bressac-de-Paillerets

Institut Gustave Roussy, Villejuif, France

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Alain Aurias

Alain Aurias

Laboratoire de pathologie moléculaire des cancers, Unité de Génétique Oncologique, Institut Curie, Paris, France

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Dominique Stoppa-Lyonnet

Dominique Stoppa-Lyonnet

Laboratoire de pathologie moléculaire des cancers, Unité de Génétique Oncologique, Institut Curie, Paris, France

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Nadine Andrieu

Corresponding Author

Nadine Andrieu

U521 INSERM, Institut Gustave Roussy, Villejuif, France

Fax: +33-1-42-11-53-15

U521 INSERM, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, FranceSearch for more papers by this author
First published: 09 June 2001
Citations: 107

Abstract

Epidemiological studies have suggested that ataxia-telangiectasia (AT) heterozygotes have a predisposition to cancer, especially breast cancer in women. Now, haplotyping can identify heterozygotes for AT mutation (ATM) in AT families, allowing the risk of cancer associated with ATM heterozygosity status to be better assessed. We report a family study of AT patients, in which we estimated the risk of cancer according to ATM heterozygosity status. We analyzed demographic characteristics and occurrence of cancer in 1,423 relatives of AT patients. Haplotyping was performed in living relatives. The probability of being heterozygotes for ATM was calculated for deceased relatives. The risk of developing cancer was estimated in the cohort of relatives, and expected numbers of cancer cases were calculated from French age period-specific incidence rates. The number of cancers at all sites in the total population of relatives was not higher than expected. However, significant heterogeneity was found according to ATM heterozygosity status. This is mainly due to the increased risk of breast cancer previously observed in obligate heterozygotes. In obligate heterozygotes, relative risk (RR) was non-significantly increased for thyroid cancer, leukemia and liver cancer. Risks of ovarian, lung, pancreatic, kidney, stomach and colorectal cancers were non-significantly increased in the group with 0.5 probability of being heterozygotes. The RR was not significantly increased for any site of cancer, except for breast. Therefore, there is no evidence that specific screening of relatives of AT patients would be justified at particular sites other than the breast. However, the amplitude of the risk of breast cancer estimated in heterozygous women does not appear to justify a separate screening program from that already available to women with a first-degree relative affected by breast cancer. © 2001 Wiley-Liss, Inc.

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