Abstract
To identify the genetic cause for a family featuring language retardation using combined cytogenetic and molecular genetic methods. Following conventional G-banded karyotype analysis, the additional Y chromosome was identified by fluorescence in situ hybridization (FISH) and multiplex ligation dependent probe amplification (MLPA). Whole genome array comparative genomic hybridization (aCGH) was also carried out to detect minor structural chromosomal abnormalities. The proband's karyotype was determined as 47,XY,+?, and the unknown aberrant chromosome was identified as Yqh+ with FISH, MLPA and aCGH. No other chromosomal abnormality was found in the pedigree. Cytogenetic methods combined with FISH, MLPA, and aCGH can efficiently identify the origin of unknown chromosomes and provide accurate clues for clinical diagnosis and treatment.
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