Volume 49, Issue 7 pp. 635-641
Research Article

Noonan syndrome, the SOS1 gene and embryonal rhabdomyosarcoma

Marjolijn C. J. Jongmans

Corresponding Author

Marjolijn C. J. Jongmans

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

Department of Human Genetics, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, the NetherlandsSearch for more papers by this author
Peter M. Hoogerbrugge

Peter M. Hoogerbrugge

Department of Pediatric Hemato-oncology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Linda Hilkens

Linda Hilkens

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Uta Flucke

Uta Flucke

Department of Pathology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Ineke van der Burgt

Ineke van der Burgt

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Kees Noordam

Kees Noordam

Department of Pediatric Endocrinology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Martina Ruiterkamp-Versteeg

Martina Ruiterkamp-Versteeg

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Helger G. Yntema

Helger G. Yntema

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Willy M. Nillesen

Willy M. Nillesen

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Marjolijn J. L. Ligtenberg

Marjolijn J. L. Ligtenberg

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Ad Geurts van Kessel

Ad Geurts van Kessel

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Roland P. Kuiper

Roland P. Kuiper

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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Nicoline Hoogerbrugge

Nicoline Hoogerbrugge

Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands

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First published: 13 April 2010
Citations: 28

Abstract

Noonan Syndrome (NS) is an autosomal dominant condition characterized by short stature, facial dysmorphisms, and congenital heart defects, and is caused by mutations in either PTPN11, KRAS, NRAS, SHOC2, RAF1, or SOS1. Furthermore, NS is known for its predisposition to develop cancer, particularly hematological malignancies and specific solid tumors, mainly neuroblastoma and embryonal rhabdomyosacroma (ERMS). Until recently, however, cancer predisposition in NS patients with SOS1 mutations was not reported. Here we present a NS patient with a de novo germline SOS1 mutation (p.Lys728Ile) and ERMS. This heterozygous germline mutation was homozygously present in the ERMS of this patient due to an acquired uniparental disomy (UPD) of chromosome 2. In addition, several other chromosomal aberrations were encountered, some of which are known to recurrently occur in ERMS. Sequence analysis of the SOS1 gene in 20 sporadic ERMS tumors failed to reveal any pathogenic mutations, implicating that SOS1 is not a major player in the development of this tumor outside the context of NS. © 2010 Wiley-Liss, Inc.

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