X-derived marker chromosome in patient with mosaic Turner syndrome and Dandy-Walker syndrome: A case report

Alena S. Telepova, Svetlana A. Romanenko, Natalya A. Lemskaya, Yulia V. Maksimova, Asia R. Shorina, Dmitry V. Yudkin

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Small supernumerary marker chromosomes can be derived from autosomes and sex chromosomes and can accompany chromosome pathologies, such as Turner syndrome. Case presentation: Here, we present a case report of a patient with mosaic Turner syndrome and Dandy-Walker syndrome carrying a marker chromosome. We showed the presence of the marker chromosome in 33.8% of blood cells. FISH of the probe derived from the marker chromosome by microdissection revealed that it originated from the centromeric region of chromosome X. Additionally, we showed no telomeric sequences and no XIST sequence in the marker chromosome. This is the first report of these two syndromes accompanied by the presence of a marker chromosome. Conclusion: Marker chromosome was X-derived and originated from centromeric region. Patient has mild symptoms but there is no XIST gene in marker chromosome. Trial registration: CPG137. Registered 03 March 2017.

Original languageEnglish
Article number43
Pages (from-to)43
Number of pages4
JournalMolecular Cytogenetics
Volume10
Issue number1
DOIs
Publication statusPublished - 17 Nov 2017

Keywords

  • Dandy-Walker syndrome
  • Marker chromosome
  • Turner syndrome
  • X-chromosome
  • OUTCOMES
  • 45,X/46,X,+MAR KARYOTYPE

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