Chromosome 4p Duplication, also known as duplication 4p, is related to wolf-hirschhorn syndrome(deletion of 4p) and myxedema, and has symptoms including intellectual deficit/mental/psychomotor retardation/learning disability, total/partial trisomy/duplication and short stature/dwarfism/nanism. Affiliated tissues include testes and bone.

체염색체 4번 전체 혹은 단완(p)이 3개 있는 것으로 희귀한 염색체 이상이다.

지능저하, 운동기능 저하, 저신장, 골발달미숙 등