| Institution: | 1. Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan;2. Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan;3. Department of Medicine, Mackay Medical College, New Taipei City, Taiwan;4. Department of Biotechnology, Asia University, Taichung, Taiwan;5. School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan;6. Institute of Clinical and Community Health Nursing, National Yang-Ming University, Taipei, Taiwan;g Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan;h GenePhile Bioscience Laboratory, Ko''s Obstetrics and Gynecology, Taipei, Taiwan;i Department of Obstetrics and Gynecology, China Medical University Hospital, Taichung, Taiwan;j Department of Bioengineering, Tatung University, Taipei, Taiwan |
| Abstract: | We present prenatal diagnosis of mosaicism for a small supernumerary marker chromosome (sSMC) derived from chromosome 22 associated with cat eye syndrome (CES) using cultured amniocytes in a pregnancy with fetal microcephaly, intrauterine growth restriction, left renal hypoplasia, total anomalous pulmonary venous return with dominant right heart and right ear deformity. The sSMC was bisatellited and dicentric, and was characterized by multiplex ligation-dependent probe amplification (MLPA) and array comparative genomic hybridization (aCGH). The SALSA MLPA P250-B1 DiGeorge Probemix showed duplication of gene dosage in the CES region. aCGH showed a 1.26-Mb duplication at 22q11.1–q11.21 encompassing CECR1–CECR7. The sSMC was likely inv dup(22) (q11.21). Prenatal diagnosis of an sSMC(22) at amniocentesis should alert CES. MLPA, aCGH and fetal ultrasound are useful for rapid diagnosis of CES in case of prenatally detected sSMC(22). |
