Characterization of a cytogenetic 17q11.2 deletion in an NF1 patient with a contiguous gene syndrome

Paola Riva, Pierangela Castorina, Siranoush Manoukian, Leda Dalprà, Luisa Doneda, Giuseppe Marini, Johannes Den Dunnen, Lidia Larizza

Research output: Contribution to journalArticle

Abstract

We report on a rare patient screened as a putative carrier of a contiguous gene syndrome on the basis of a complex phenotype characterized by sporadic neurofibromatosis type 1 (NF1), dysmorphism, mental retardation and severe skeletal anomalies. A cytogenetically visible 17q11.2 deletion was detected in the patient's karyotype by high-resolution banding and confirmed by fluorescence in situ hybridization with yeast artificial chromosomes targeting the NF1 region. Analysis of the segregation from parents to proband of 13 polymorphic DNA markers, either contiguous or contained within the NF1 gene, showed that the patient is hemizygous at sites within the NF1 gene - the AAAT-Alu repeat in the 5' region of intron 27b, the CA/GT microsatellite in the 3' region of intron 27b, and the CA/GT microsatellite in intron 38 - and at the extragenic D17S798 locus, distal to the 3' end of NF1. The patient may be an important resource in the identification of genes downstream of NF1 that may contribute to some of his extra-NF1 clinical signs.

Original languageEnglish
Pages (from-to)646-650
Number of pages5
JournalHuman Genetics
Volume98
Issue number6
DOIs
Publication statusPublished - Dec 1996

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics

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