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How is Nonketotic Hyperglycinemia diagnosed?

See how Nonketotic Hyperglycinemia is diagnosed. Which specialists are essential to meet, what tests are needed and other useful information for the diagnosis of Nonketotic Hyperglycinemia

Nonketotic Hyperglycinemia diagnosis

Nonketotic Hyperglycinemia (NKH) is a rare genetic disorder that affects the breakdown of the amino acid glycine in the body. It is typically diagnosed in infancy or early childhood and can lead to severe neurological symptoms.



Diagnosing NKH involves a combination of clinical evaluation, laboratory tests, and genetic analysis. The initial step is often prompted by the presence of symptoms such as poor feeding, lethargy, seizures, and developmental delays.



Urine organic acid analysis is a common diagnostic test used to detect elevated levels of glycine. This test involves collecting a urine sample from the affected individual and analyzing it for abnormal organic acids. Elevated glycine levels in the urine can be indicative of NKH.



Blood tests are also performed to measure the levels of glycine and other amino acids in the blood. High glycine levels in the blood can further support the diagnosis of NKH.



Cerebrospinal fluid (CSF) analysis may be conducted to assess glycine levels in the fluid surrounding the brain and spinal cord. Elevated glycine levels in the CSF can provide additional evidence of NKH.



Genetic testing plays a crucial role in confirming the diagnosis of NKH. It involves analyzing the genes associated with glycine metabolism to identify any mutations or abnormalities. This can be done through techniques such as DNA sequencing or targeted gene panel testing.



In some cases, brain imaging studies like magnetic resonance imaging (MRI) may be performed to evaluate the structure and function of the brain. These imaging tests can help identify any abnormalities or damage that may be associated with NKH.



It is important to note that the diagnosis of NKH requires a multidisciplinary approach involving pediatricians, geneticists, neurologists, and other specialists. The combination of clinical evaluation, laboratory tests, and genetic analysis is crucial for an accurate diagnosis, which is essential for appropriate management and treatment of the condition.


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