Schinzel–Giedion syndrome

Schinzel–Giedion syndrome
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Severe developmental delay, distinctive facial features, skeletal abnormalities
Complications	N/A
Onset	Congenital
Duration	Lifelong
Types	N/A
Causes	Genetic mutation
Risks	N/A
Diagnosis	Genetic testing, clinical evaluation
Differential diagnosis	N/A
Prevention	N/A
Treatment	Supportive care
Medication	N/A
Prognosis	Poor
Frequency	N/A
Deaths	N/A

Schinzel–Giedion syndrome is a rare genetic disorder characterized by severe developmental delay, distinctive facial features, and multiple congenital anomalies. It is caused by mutations in the SETBP1 gene, which plays a role in chromatin remodeling and gene expression.

Clinical Features

Individuals with Schinzel–Giedion syndrome typically present with a range of clinical features, including:

• Distinctive facial features: These may include a prominent forehead, midface hypoplasia, hypertelorism (wide-set eyes), and a short nose with a broad nasal bridge.
• Skeletal abnormalities: These can include craniosynostosis, scoliosis, and other bone malformations.
• Neurological issues: Severe developmental delay and intellectual disability are common. Seizures may also occur.
• Renal and urogenital anomalies: Hydronephrosis and other kidney abnormalities are often present.
• Other anomalies: These may include congenital heart defects, hearing loss, and gastrointestinal issues.

Genetics

Schinzel–Giedion syndrome is caused by de novo mutations in the SETBP1 gene located on chromosome 18. These mutations are typically not inherited from the parents but occur spontaneously. The SETBP1 gene is involved in regulating the expression of other genes, and mutations can disrupt normal development.

Diagnosis

Diagnosis of Schinzel–Giedion syndrome is based on clinical evaluation and confirmed by genetic testing. The presence of characteristic physical features and developmental delays may prompt genetic testing to identify mutations in the SETBP1 gene.

Management

There is no cure for Schinzel–Giedion syndrome, and treatment is primarily supportive. Management may include:

• Multidisciplinary care: Involving specialists such as pediatricians, neurologists, geneticists, and orthopedic surgeons.
• Seizure management: Antiepileptic drugs may be used to control seizures.
• Physical and occupational therapy: To support developmental progress and improve quality of life.
• Surgical interventions: May be necessary for correcting skeletal or renal anomalies.

Prognosis

The prognosis for individuals with Schinzel–Giedion syndrome is generally poor, with many affected individuals experiencing severe health challenges and reduced life expectancy. Early intervention and supportive care can improve quality of life.

Also see

• SETBP1 disorder
• Craniosynostosis
• Developmental delay
• Genetic testing

NIH genetic and rare disease info

• NIH info on Schinzel–Giedion syndrome

Schinzel–Giedion syndrome is a rare disease.