Nijmegen-Breakage Syndrome; Two Siblings Presenting with Different Phenotypes

Kiykim A., AYDINER E., ÖĞÜLÜR İ., BARIŞ S., Ozen A. O., Serifov K., ...More

ASTIM ALLERJI IMMUNOLOJI, vol.14, no.2, pp.98-102, 2016 (ESCI) identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 2
  • Publication Date: 2016
  • Doi Number: 10.21911/aai.6007
  • Journal Name: ASTIM ALLERJI IMMUNOLOJI
  • Journal Indexes: Emerging Sources Citation Index (ESCI), TR DİZİN (ULAKBİM)
  • Page Numbers: pp.98-102
  • Keywords: Nijmegen breakage syndrome, lymphopenia, chromosomal instability, microcephaly, pachygyria, SYNDROME GENE NBS1, 657DEL5 MUTATION
  • Marmara University Affiliated: Yes

Abstract

The Nijmegen Breakage syndrome (NBS) is characterized by chromosomal instability, combined immunodeficiency, and distinctive physical features. We present two siblings with NBS presenting with strikingly different manifestations. The proband is a 6-year-old female with short stature, microcephaly, hepatosplenomegaly, rectovaginal fistula, anal atresia, an ectopic kidney, recurrent fevers and otitis media. A 7-year-old brother has developmental delay, failure to thrive, and microcephaly without recurring infections. Both patients have hypogammaglobulinemia, B cell lymphopenia and reduced phytohaemagglutinin-induced lymphocyte proliferation. Both siblings are homozygous for the c.657_661delACAAA (p.Lys219Asnfs*16) mutation in the NBN (NBS1) gene.