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[Systematic genetic analysis for a case with duplication 9p].

Jianlin Zhang1, Haibo Li, Shenghua Jiang

  • 1Department of Gynaecology and Obstetrics, The Hospital Affiliated to Nantong University, Nantong, Jiangsu 226001, P.R.China. jsnt_zhangyuquan@yahoo.com.cn; hongliszivf@163.com.

Zhonghua Yi Xue Yi Chuan Xue Za Zhi = Zhonghua Yixue Yichuanxue Zazhi = Chinese Journal of Medical Genetics
|April 12, 2015
PubMed
Summary
This summary is machine-generated.

Genetic testing identified a 9p duplication as the cause of growth and mental retardation in a child. This chromosomal abnormality resulted from a parental rearrangement, highlighting the importance of advanced genetic analysis for diagnosis.

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Area of Science:

  • Human Genetics
  • Clinical Cytogenetics

Background:

  • Genetic disorders can lead to developmental abnormalities, including growth and mental retardation.
  • Accurate diagnosis of chromosomal abnormalities is crucial for effective clinical management.

Observation:

  • A patient presented with significant growth retardation and mental retardation.
  • Initial G-banding karyotyping suggested a chromosomal abnormality involving chromosome 9.

Findings:

  • Multiplex Ligation-dependent Probe Amplification (MLPA) confirmed a 9p duplication (9p11.2-p24.3) in the patient.
  • The duplication arose from a balanced chromosomal rearrangement between chromosomes 9 and 14 in the patient's father.

Implications:

  • 9p duplication syndrome is identified as the cause of the patient's phenotype.
  • Combining cytogenetic methods with MLPA offers an efficient and accurate approach for diagnosing chromosomal abnormalities.
  • This diagnostic strategy aids in clinical decision-making and treatment planning for affected individuals.