E79.1
Lesch-Nyhan syndrome
Clinical Classification Guidelines
Inclusion Terms
- HGPRT deficiency
Medical Intelligence & Overview
Lesch-Nyhan syndrome is a rare genetic disorder caused by a deficiency of an enzyme called hypoxanthine-guanine phosphoribosyltransferase (HGPRT). This condition affects how the body processes purines, which are substances found in many foods and are also naturally occurring in the body. The deficiency leads to the build-up of waste products that can harm the nervous system and the kidneys. Individuals with Lesch-Nyhan syndrome often experience neurological problems, behavioral issues, and specific physical symptoms. It is primarily diagnosed in early childhood and is inherited in an X-linked recessive pattern, mostly affecting males.
Causes & Symptoms
Clinical Causes: Genetic mutation affecting the HPRT1 gene on the X chromosome Inheritance pattern: X-linked recessive Deficiency of the enzyme HGPRT, which impairs purine metabolism
Key Symptoms: Involuntary muscle movements and neurological abnormalities Self-injurious behaviors such as biting lips or fingers Delayed developmental milestones Poor muscle control and spasticity Gout or kidney stones due to uric acid buildup Intellectual disability
Diagnostic & Treatment
Diagnosis Path: Diagnosis is based on clinical symptoms, family history, and laboratory tests. Blood and urine tests can measure uric acid levels and enzyme activity. Genetic testing can confirm mutations in the HPRT1 gene. Early diagnosis is important for managing symptoms and preventing complications.
Treatment Protocols: There is no cure for Lesch-Nyhan syndrome, but treatment aims to manage symptoms and improve quality of life. Approaches may include medications to reduce uric acid levels, behavioral therapy to address self-injury, physical therapy to improve muscle control, and support for developmental delays. Regular medical monitoring is essential to address emerging issues promptly.
Clinical Advice & FAQs
Billing Guidance
Is E79.1 a billable ICD-10 code?
Yes, E79.1 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E79.1?
Clinical documentation must specify the nature of Lesch-Nyhan syndrome and any associated comorbidities for accurate reporting.
Cite this Clinical Reference