Emanuel syndrome

Human male karyotpe high resolution - Chromosome 11 cropped.png

Emanuel syndrome is a rare genetic disorder characterized by multiple congenital anomalies and developmental delays. It is caused by the presence of an extra chromosome derived from chromosomes 11 and 22, known as a supernumerary derivative chromosome 22.

Genetics

Emanuel syndrome is typically caused by a chromosomal translocation between chromosomes 11 and 22. This translocation results in the formation of an extra derivative chromosome, which contains additional genetic material from both chromosomes. The condition is usually inherited from a parent who carries a balanced translocation, meaning they have the same chromosomal rearrangement but without any associated symptoms.

Clinical Features

Individuals with Emanuel syndrome often present with a variety of clinical features, including:

• Developmental delay and intellectual disability
• Hypotonia (low muscle tone)
• Distinctive facial features such as micrognathia (small jaw), ear anomalies, and cleft or high-arched palate
• Congenital heart defects
• Genitourinary anomalies
• Feeding difficulties
• Hearing loss

Diagnosis

The diagnosis of Emanuel syndrome is confirmed through genetic testing, specifically karyotyping and fluorescence in situ hybridization (FISH). These tests can identify the presence of the supernumerary derivative chromosome 22.

Management

There is no cure for Emanuel syndrome, and treatment is primarily supportive and symptomatic. Management may include:

• Early intervention programs and special education to address developmental delays
• Physical therapy to improve muscle tone and motor skills
• Surgical interventions for congenital heart defects and other structural anomalies
• Regular monitoring and treatment for hearing loss and feeding difficulties

Prognosis

The prognosis for individuals with Emanuel syndrome varies depending on the severity of the associated anomalies and the effectiveness of the supportive care provided. Many individuals with Emanuel syndrome have significant developmental and medical challenges, but with appropriate interventions, they can achieve improved quality of life.

Related Pages

• Chromosomal translocation
• Developmental delay
• Congenital heart defect
• Genetic disorder
• Karyotyping
• Fluorescence in situ hybridization

External Links

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