Duplication 18p with mild influence on the phenotype

Abstract
Duplication I8p was found in a 12‐year‐old girl whose father carried a balanced translocation involving the same chromosome segment, t(18;21)(p11;p11). Our patient had delayed speech development, mild psychomotor retardation, epilepsy, and minor anomalies, including a low nasal bridge, anti‐mongolian eye slant, low‐set ears, and narrowly arched palate. These findings are compared with eight previously published cases.