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Papoulidis I, Vetro A, Paspaliaris V, Ziegler M, Kreskowski K, Daskalakis G, Papadopoulos V, Dagklis T, Liehr T, Thomaidis L, Manolakos E. A Girl with 10 Mb Distal Xp Deletion Arising from Maternal Pericentric Inversion: Clinical Data and Molecular Characterization. Curr Genomics 2018; 19:240-246. [PMID: 29606911 PMCID: PMC5850512 DOI: 10.2174/1389202918666170725102220] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 01/27/2017] [Accepted: 02/01/2017] [Indexed: 11/22/2022] Open
Abstract
Background: Short arm deletions of the X-chromosome are challenging issues for genetic counseling due to their low penetrance in population. Female carriers of these deletions have milder phenotype than male ones, considering the intellectual ability and social skills, probably because of the X-chromosome inactivation phenomenon. Case report: A female patient with a 10Mb distal Xp deletion and an Xq duplication, showing mild intellectual disability, is described in this report. While the deletion arose from a maternal pericentric inversion, the duplication was directly transmitted from the mother who is phenotypically normal. Conclusion: This report underlines the usefulness of molecular cytogenetic technics in postnatal diagnosis.
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Affiliation(s)
- Ioannis Papoulidis
- Access to Genome P.C., Clinical Laboratory Genetics, Athens-Thessaloniki, Greece
| | - Annalisa Vetro
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Vassilis Paspaliaris
- Access to Genome P.C., Clinical Laboratory Genetics, Athens-Thessaloniki, Greece
| | - Monika Ziegler
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743Jena, Germany
| | - Katharina Kreskowski
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743Jena, Germany
| | - George Daskalakis
- Department of Obstetrics & Gynecology, "Alexandra" Hospital, University of Athens, Athens, Greece
| | | | - Themistoklis Dagklis
- 3 Obstetrics and Gynecology Clinic, Ippokrateion Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Thomas Liehr
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743Jena, Germany
| | - Loretta Thomaidis
- Developmental Assessment Unit, 2 Department of Pediatrics, P. & A. Kyriakou Children's Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Emmanouil Manolakos
- Access to Genome P.C., Clinical Laboratory Genetics, Athens-Thessaloniki, Greece.,Developmental Assessment Unit, 2 Department of Pediatrics, P. & A. Kyriakou Children's Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece.,Department of Medical Genetics, University of Cagliari, Binaghi Hospital, Cagliari, Italy
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Lesca G, Sinilnikova O, Theuil G, Blanc J, Edery P, Till M. Xp22.3 microdeletion including VCX-A and VCX-B1 genes in an X-linked ichthyosis family: no difference in deletion size for patients with and without mental retardation. Clin Genet 2005; 67:367-8. [PMID: 15733277 DOI: 10.1111/j.1399-0004.2005.00417.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kokalj-Vokac N, Marcun-Varda N, Zagorac A, Erjavec-Skerget A, Zagradisnik B, Todorovic M, Gregoric A. Subterminal deletion/duplication event in an affected male due to maternal X chromosome pericentric inversion. Eur J Pediatr 2004; 163:658-63. [PMID: 15309625 DOI: 10.1007/s00431-004-1519-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2004] [Revised: 06/21/2004] [Accepted: 06/22/2004] [Indexed: 11/25/2022]
Abstract
UNLABELLED We report a 13-month-old male infant with an apparently normal karyotype, severe growth and developmental delay, ichthyosis, hypogonadism, limb shortness, hypoplasia of the corpus callosum and a round, flat face and thin upper lip as a consequence of a subtelomeric del/dup event of the X chromosome. The recombinant X chromosome (rec(X)), derived from crossing-over within the inversion, was identified in a family, in which the mother is a carrier of pericentric inversion of one X chromosome and pericentric inversion of the heterochromatic region of chromosome 9. The inv(X) chromosome was also analysed in her sister and daughter. The rec(X) had a duplication of the segment Xq27.3-->Xqter and deletion of the Xp22.31-->Xpter and was interpreted as Xqter-Xq27.3::Xp22.31-Xqter. The rec (X) was characterised by FISH using a number of BAC probes. There are only three published reports of chromosome rearrangements resulting in a similar subtelomeric duplication of Xq in males. The proband's phenotype corresponds to descriptions of contiguous gene syndromes due to deletion of the STS, SHOX, ARSE and KAL genes. Despite the loss of the ARSE gene there was no evidence of chondrodysplasia punctata. Additional conditions associated with duplication of the Xq28 segment, such as severe growth retardation and developmental delay, a peculiar head shape, atrophy of the cerebral hemispheres and hypoplasia of the cerebellum and corpus callosum, were observed. CONCLUSION Fluorescent in situ hybridisation techniques using subtelomeric DNA probes are essential tools for detection of such complex submicroscopic chromosomal rearrangements as the dup/del event of the X chromosome described in our patient.
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Affiliation(s)
- Nadja Kokalj-Vokac
- Medical Genetics Laboratory, Maribor Teaching Hospital, Ljubljanska 5, 2000, Maribor, Slovenia,
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