Objective: To diagnose a fetus with Phelan-McDermid syndrome (PMS) using various techniques.
Methods: Single nucleotide polymorphism array (SNP Array), multiplex ligation-dependent probe amplification (MLPA), fluorescence in situ hybridization (FISH) were applied in conjunction for the prenatal diagnosis of the fetus.
Results: SNP Array detected a 4.03 Mb microdeletion at 22q13.31q13.33 in the fetus, which was confirmed by FISH and MLPA. FISH analysis of the parents suggested that the 22q13.31q13.33 deletion has a de novo origin.
Conclusion: Combined use of various techniques can enable accurate prenatal diagnosis and genetic counseling.