JOURNAL ARTICLE

[Phenotypic and genetic analysis of an inv dup(15) case with a BP3:BP3 rearrangement]

Fuchun Zhong, Fenghua Lan, Xiao Zhang, Yuxiang Lin, Yanhong Lin, Aizhen Yan, Xiangdong Tu
Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics 2017 June 10, 34 (3): 402-405
28604965

OBJECTIVE: To analyze a case of supernumerary marker chromosome (SMC) with combined genetic techniques and explore its correlation with the clinical phenotype.

METHODS: The SMC was analyzed with G-banded karyotyping, multiplex ligation dependent probe amplification (MLPA), fluorescence in situ hybridization (FISH), and single nucleotide polymorphism array (SNP-array).

RESULTS: G-banding analysis indicated that the patient has a karyotype of 47,XX,+mar. MLPA showed that there were duplications of proximal 15q. FISH assay using D15Z4 probes indicated that the SMC was a pseudodicentric chromosome derived from chromosome 15. And SNP-array revealed that there were two extra copies of 15q11-13 region spanning from locus 20 161 372 to 29 071 810.

CONCLUSION: The duplication of Prader-Willi/Angelman syndrome critical region probably underlies the abnormal phenotype of the inv dup(15) case with a BP3:BP3 rearrangement.

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