This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Chromosome 4p duplication is a chromosome abnormality that occurs when there is an extra copy of genetic material on the short arm (p) of chromosome 4. The severity of the condition and the signs and symptoms depend on the size and location of the duplication and which genes are involved. Features that often occur in people with chromosome 4p duplication include developmental delay, intellectual disability, behavioral problems and distinctive facial features. Although some cases occur sporadically, most are inherited from a parent who has a balanced translocation. Treatment is based on the signs and symptoms present in each person.
For more information, visit GARD.