A Rare Finding of Mosaic 45,XX,der(13;21)(q10;q10)[15]/46,XX,r(13)(p11.2q33) Following Abnormal Prenatal Chromosomal Microarray Testing
Mosaicism for both a ring chromosome and Robertsonian translocation is a rarely reported cytogenetic phenomenon. We describe a case referred for testing following abnormal noninvasive prenatal screening for trisomy 13. Prenatal chromosomal microarray (CMA) testing identified a mosaic 3.6‐Mb terminal loss in 13q34, whic...