One of the more characteristic symptoms is what is described as Greek warrior helmet facial features.
These collectively include a prominent forehead, wide-set eyes, and a broad-beaked nose.
The distinctive facial features are typically the first clue that the child has the disorder.

Ross J. Lenox / Wikimedia CC By-SA 4.0
Genetic testing is necessary to confirm the diagnosis.
The severity of intellectual disability can also vary significantly.
These include theChromosome Disorder Outreachgroup in Boca Raton, Florida and the4P Support Group.
National Organization for Rare Disorders.Wolf-Hirschorn syndrome.
National Library of Medicine: MedlinePlus.Wolf-Hirschhorn syndrome.
National Institutes of Health: Genetic and Rare Diseases Information Center.Wolf-Hirschhorn syndrome.
2020;15(1):293. doi:10.1186/s13023-020-01476-8