Alternative titles and symbols : Inv dup(22)(q11); Chromosome 22 partial tetrasomy; Schmid-fraccaro syndrome;
Description : Cat eye syndrome (CES) is characterized clinically by the combination of coloboma
of the iris and anal atresia with fistula, downslanting palpebral fissures, preauricular
tags and/or pits, frequent occurrence of heart and renal malformations, and normal
or near-normal mental development. A small supernumerary chromosome (smaller than
chromosome 21) is present, frequently has 2 centromeres, is bisatellited, and represents
an inv dup(22)(q11).;
Inheritance : Autosomal dominant;
Molecular basis : Supernumerary inv dup(22)(q11) chromosome, occasionally due to interstitial duplication
of 22q11;