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Which are the symptoms of Nonketotic Hyperglycinemia?

See the worst symptoms of affected by Nonketotic Hyperglycinemia here

Nonketotic Hyperglycinemia symptoms

Symptoms of Nonketotic Hyperglycinemia


Nonketotic Hyperglycinemia (NKH) is a rare genetic disorder that affects the breakdown of the amino acid glycine in the body. It is caused by a deficiency of the enzyme glycine cleavage system, which leads to an accumulation of glycine in the brain and other tissues. This buildup of glycine can cause a range of symptoms and complications.



Early-Onset Symptoms:


Nonketotic Hyperglycinemia is typically diagnosed in the first few days or weeks of life. Infants with NKH may exhibit the following symptoms:



  • Hypotonia: Infants with NKH often have low muscle tone, which can make them appear floppy or weak.

  • Seizures: Seizures are a common symptom of NKH and can vary in severity and frequency.

  • Apnea: Some infants with NKH may experience episodes of apnea, where they temporarily stop breathing.

  • Poor feeding: Babies with NKH may have difficulty feeding, leading to inadequate weight gain.

  • Developmental delays: NKH can cause delays in reaching developmental milestones, such as sitting, crawling, and walking.



Later-Onset Symptoms:


In some cases, the symptoms of NKH may not become apparent until later in infancy or childhood. These symptoms can include:



  • Intellectual disability: Children with NKH may have varying degrees of intellectual disability, ranging from mild to severe.

  • Speech and language delays: Difficulties with speech and language development are common in individuals with NKH.

  • Behavioral problems: Some children with NKH may exhibit behavioral issues, such as hyperactivity, impulsivity, or aggression.

  • Sleep disturbances: Sleep problems, including difficulty falling asleep or staying asleep, may occur in individuals with NKH.

  • Movement disorders: NKH can cause abnormal movements, such as tremors or involuntary muscle contractions.



Complications:


Nonketotic Hyperglycinemia can lead to several complications, including:



  • Severe seizures: Some individuals with NKH may experience frequent and severe seizures that are difficult to control.

  • Respiratory problems: Breathing difficulties, including apnea and respiratory infections, can occur in individuals with NKH.

  • Swallowing difficulties: NKH can affect the muscles involved in swallowing, leading to feeding difficulties and an increased risk of aspiration.

  • Neurological damage: The accumulation of glycine in the brain can cause progressive damage to the nervous system, leading to further developmental delays and neurological problems.



Treatment:


Currently, there is no cure for Nonketotic Hyperglycinemia. Treatment focuses on managing the symptoms and complications associated with the disorder. This may include medications to control seizures, physical and occupational therapy to improve muscle tone and motor skills, and supportive care to address feeding difficulties and respiratory problems.


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