[Genetic analysis of a child with cleidocranial dysplasia and 6q21-q22.31 microdeletion].
Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics(2018)
Abstract
OBJECTIVE:To carry out genetic analysis on a child with developmental delay and multiple malformation.
METHODS:The karotypes of the child and her parents were analyzed with routine chromosomal G-banding. Their genomic DNA was analyzed with array comparative genomic hybridization (aCGH).
RESULTS:The karyotype of the proband was determined as 46,XX,del(6)(q22),inv(6)(p21.1q21), while no karyotypic abnormality was detected in her parents. aCGH has identified in the child a de novo 800 kb deletion encompassing the RUNX2 gene at 6p21.1 and a de novo 11.79 Mb deletion at 6q21-q22.31.
CONCLUSION:Both of the de novo deletions are pathogenic. Deletion of the RUNX2 gene probably underlies the cleidocranial dysplasia in the patient, while the 6q21-q22.31 deletion may result in malformation of the brain.
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Key words
Cleidocranial dysplasia,RUNX2 gene,Array comparative genomic hybridization
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