Possible intrachromosomal duplication in a case of trisomy 9p

Abstract
A 5-year-old boy with multiple minor anomalies and mental retardation was found to have chromosomal condition of 46,XY,inv dup(9p)(pter→p13::p21→p24::p13→qter). The clinical features of the propositus fit well with those of trisomy 9p which have been established to be a clinical entity.