Trisomy 17p is a rare chromosomal abnormality resulting from the duplication of the short arm of chromosome 17 and characterized by pre- and post-natal growth retardation, developmental delay, hypotonia, digital abnormalities, congenital heart defects, and distinctive facial features. The disease is trisomy 17p (Monarch Disease Ontology term MONDO_0016840). Also known as: dup(17p), trisomy type 17p.