Volume 32, Issue 3 pp. 195-202
Research Article

Sporadic multiple primary melanoma cases: CDKN2A germline mutations with a founder effect

Stéphane Auroy

Stéphane Auroy

Service de Génétique, Institut Gustave Roussy, Villejuif, France

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Marie-Françoise Avril

Marie-Françoise Avril

Service de Dermatologie, Institut Gustave Roussy, Villejuif, France

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Agnès Chompret

Agnès Chompret

Service de Dermatologie, Institut Gustave Roussy, Villejuif, France

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Danièle Pham

Danièle Pham

Service de Génétique, Institut Gustave Roussy, Villejuif, France

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Alisa M. Goldstein

Alisa M. Goldstein

Genetic Epidemiology Branch, National Cancer Institute, Bethesda, Maryland

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Giovanna Bianchi-Scarrà

Giovanna Bianchi-Scarrà

Department of Oncology, Biology and Genetics, University of Genova, Genova, Italy

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Thierry Frebourg

Thierry Frebourg

INSERM EPI9906, Faculté de Médecine et de Pharmacie, IFMRP, Rouen, France

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Pascal Joly

Pascal Joly

Service de Dermatologie, Centre Hospitalo-Universitaire Charles Nicolle, Rouen, France

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Alain Spatz

Alain Spatz

Département d'Anatomopathologie, Institut Gustave Roussy, Villejuif, France

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Carole Rubino

Carole Rubino

Service de Génétique, Institut Gustave Roussy, Villejuif, France

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Florence Demenais

Florence Demenais

INSERM EPI 00-06, Génétique des Maladies Humaines, Hôpital Saint-Louis, Paris, France

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French Hereditary Melanoma Study Group

French Hereditary Melanoma Study Group

The members of the French Hereditary Melanoma Study Group for this work included F. Berard, J.F. Blanc, F. Boitier, J.M. Bonnetblanc, F. Caux, J.P. Cesarini, J. Chevrant-Breton, L. Demange, E. Esteve, M. Frenay, F. Grange, B. Guillot, M. d'Incan, C. Lasset, C. Le Corvaisier-Pieto, M. Longy, J.L. Michel, P. Saiag, B. Sassolas, R. Triller, and P. Vabres.

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Brigitte Bressac-de Paillerets

Corresponding Author

Brigitte Bressac-de Paillerets

Service de Génétique, Institut Gustave Roussy, Villejuif, France

Service de Génétique, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, FranceSearch for more papers by this author
First published: 25 September 2001
Citations: 54

Abstract

Multiple primary cancers are one of the hallmarks of inherited predisposition. Outside the familial context, multiple primary tumors could be related either to germline de novo mutations or to low-penetrance mutations, in predisposing genes. We selected 100 patients who displayed multiple primary melanoma (MPM) without any known melanoma cases recorded within their families and looked for germline mutations in the two melanoma-predisposing genes identified to date, CDKN2A and CDK4 exon 2. Nine patients (9%) had germline mutations in CDKN2A, whereas none carried germline mutations in exon 2 of CDK4. Seven cases displayed a recurrent missense mutation, G101W, already described in more than 20 melanoma-prone families; one case carried a missense mutation never reported to date (P114S), and the last case was a carrier of a 6 bp insertion at nucleotide 57 resulting in a duplication of codons 18 and 19. To ascertain whether the G101W was a mutational hot spot for de novo mutations or a common founder mutation, we genotyped eight microsatellite markers flanking the CDKN2A gene. After allowing for recombination over time, haplotype sharing provided evidence for an original G101W mutation common to 6 out of 7 sporadic MPM cases. Therefore, it can be concluded that de novo germline CDKN2A mutations associated with MPM are rare. © 2001 Wiley-Liss, Inc.

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