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Hu J, Madan-Khetarpal S, Serrano Russi AH, Kochmar S, DeWard SJ, Sathanoori M, Surti U. Three supernumerary marker chromosomes in a patient with developmental delay, mental retardation, and dysmorphic features. GENETICS RESEARCH INTERNATIONAL 2011; 2011:185271. [PMID: 22567345 PMCID: PMC3335458 DOI: 10.4061/2011/185271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 04/28/2011] [Accepted: 05/07/2011] [Indexed: 11/20/2022]
Abstract
We characterized three supernumerary marker chromosomes (SMCs) simultaneously present in a 2-year- and 10-month-old male patient with mental retardation and dysmorphic features. Peripheral blood chromosome analysis revealed two to three SMCs in 25/26 cells analyzed. The remaining one cell had one SMC. Microarray comparative genomic hybridization (aCGH) showed mosaicism for gains of 5q35.3, 15q11.2q13.3, and 18p11.21q11.1 regions. All three gains contain multiple OMIM genes. FISH studies indicated that one of the SMCs is a dicentric ring 15 with two copies of the 15q11.2q13.3 region including SNRPN/UBE3A and two copies of the 5q35.3 region. One of the der(18)s contains the 18 centromere and 18p11.2 regions, while the other der(18) has a signal for the 18 centromere only. The phenotype of the patient is compared with that of patients with tetrasomy 15q11.2q13.3, trisomy 5q35.3, and trisomy 18p11.2. Our study demonstrates that aCGH and FISH analyses are powerful tools, which complement the conventional cytogenetic analysis for the identification of SMCs.
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Affiliation(s)
- Jie Hu
- Pittsburgh Cytogenetics Laboratory, Magee-Womens Hospital of UPMC and Department of Obstetrics, Gynecology & Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Suneeta Madan-Khetarpal
- Department of Pediatrics, University of Pittsburgh School of Medicine and Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA 15213, USA
| | - Alvaro H. Serrano Russi
- Department of Pediatrics, University of Pittsburgh School of Medicine and Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA 15213, USA
| | - Sally Kochmar
- Pittsburgh Cytogenetics Laboratory, Magee-Womens Hospital of UPMC, Pittsburgh, PA 15213, USA
| | - Stephanie J. DeWard
- Department of Pediatrics, University of Pittsburgh School of Medicine and Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA 15213, USA
| | - Malini Sathanoori
- Pittsburgh Cytogenetics Laboratory, Magee-Womens Hospital of UPMC and Department of Obstetrics, Gynecology & Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Urvashi Surti
- Pittsburgh Cytogenetics Laboratory, Magee-Womens Hospital of UPMC and Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
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Rivera H, Vásquez-Velásquez AI. 5q35 duplication and Hunter-McAlpine syndrome: missing the link. Am J Med Genet A 2010; 152A:802-3; author reply 804. [PMID: 20186800 DOI: 10.1002/ajmg.a.33262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kariminejad A, Tzschach A, Kariminejad R. Reply to 5q35 duplication and Hunter-McAlpine syndrome: Missing the link. Am J Med Genet A 2010. [DOI: 10.1002/ajmg.a.33272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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