Wolf-Hirschhorn syndrome

Wolf-Hirschhorn syndrome (WHS), also known as 4p- syndrome or 4p deletion syndrome, is a rare genetic disorder caused by a partial deletion of the short arm of chromosome 4 (4p16.3). The critical region involves the WHSC1 (NSD2) and LETM1 genes. WHS is characterized by a distinctive facial appearance often described as a 'Greek warrior helmet' profile, featuring a broad forehead, prominent glabella, widely spaced eyes (hypertelorism), short philtrum, downturned mouth, and micrognathia. Affected individuals typically present with severe intrauterine and postnatal growth restriction, significant intellectual disability, and marked developmental delay. The syndrome affects multiple body systems. Seizures occur in approximately 90-100% of patients, often beginning in infancy, and may include various types of epilepsy that can be difficult to manage. Congenital heart defects are present in about 50% of cases, most commonly atrial and ventricular septal defects. Skeletal abnormalities, including scoliosis and delayed bone age, are common. Urogenital anomalies (particularly hypospadias in males and renal malformations), hearing loss, and immune deficiency with recurrent infections are also frequently observed. Feeding difficulties are nearly universal in infancy and may require gastrostomy tube placement. There is no cure for Wolf-Hirschhorn syndrome, and management is supportive and multidisciplinary. Treatment focuses on seizure control with antiepileptic medications, surgical correction of heart defects when indicated, nutritional support, and early intervention programs including physical therapy, occupational therapy, and speech therapy. Regular monitoring of growth, hearing, vision, and immune function is recommended. With improved medical care, survival into adulthood is increasingly common, though the degree of intellectual disability remains significant. Prognosis varies depending on the size of the chromosomal deletion and the severity of associated malformations.

Common questions about Wolf-Hirschhorn syndrome