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Rett syndrome, also known as Rett syndrome or Rett's disease, is a rare neurological disorder that primarily affects girls. It is characterized by a period of normal early development followed by a slowing down of head growth and loss of purposeful hand skills. The syndrome is named after Andreas Rett, the pediatrician who first described it in 1966.

The cause of Rett syndrome is not fully understood, but it is believed to be related to mutations in the MECP2 gene on the X chromosome. This gene is involved in the regulation of other genes, and mutations in MECP2 can lead to abnormal brain development.

The symptoms of Rett syndrome typically appear between 6 and 18 months of age and include:

Loss of purposeful hand skills, such as reaching, grasping, or using objects

Abnormal hand movements, such as hand-wringing or hand-mouthing

Loss of spoken language

Difficulty with coordination and balance

Seizures

Intellectual disability, ranging from mild to severe

Autistic-like behaviors, such as repetitive hand movements or body rocking

There is no cure for Rett syndrome, but there are treatments that can help manage symptoms and improve quality of life. These may include:

Physical therapy to improve coordination and balance

Occupational therapy to improve hand skills and fine motor control

Speech therapy to improve communication skills

Medications to control seizures

Behavioral therapies to address autistic-like behaviors

Research is ongoing to better understand the causes of Rett syndrome and to develop more effective treatments. Early diagnosis and intervention can improve outcomes for individuals with Rett syndrome.