E72.11
Homocystinuria
Clinical Classification Guidelines
Inclusion Terms
- Cystathionine synthase deficiency
Medical Intelligence & Overview
Homocystinuria is a rare inherited disorder that affects the body's ability to process certain amino acids, specifically methionine. This metabolic condition results from a deficiency of the enzyme cystathionine synthase, which is essential in the breakdown of methionine into other beneficial compounds. Without proper enzyme activity, homocysteine and methionine levels in the blood can become abnormally high, leading to various health complications. Early detection and management are crucial to prevent or minimize the impact of the disorder on an individual's development and overall health.
Causes & Symptoms
Clinical Causes: Genetic mutation inherited in an autosomal recessive pattern Deficiency of the enzyme cystathionine synthase due to genetic factors Increased levels of methionine intake in the diet, though this alone doesn't cause the disorder Potential environmental influences that might affect enzyme activity, although genetic factors are primary
Key Symptoms: Dislocated lenses in the eyes (ectopia lentis) Skeletal abnormalities such as long limbs, scoliosis, or joint hyperflexibility Developmental delays and cognitive challenges Poor coordination and muscle weakness Clustered blood clots that can lead to strokes or other circulatory issues Delayed puberty or growth delays Seizures in some cases Behavioral problems or psychiatric symptoms
Diagnostic & Treatment
Diagnosis Path: Diagnosis involves analyzing blood and urine samples to measure levels of homocysteine, methionine, and other related metabolites. Newborn screening programs in many countries include tests for homocystinuria. Confirmatory testing may involve genetic analysis to identify mutations in the CBS gene responsible for enzyme deficiency. Early diagnosis allows for timely intervention, which can mitigate many symptoms and complications associated with the condition.
Treatment Protocols: Reducing methionine intake through a specialized diet that limits high-protein foods Supplementing with vitamins such as B6 (pyridoxine), B12, and folic acid, which can help lower homocysteine levels Using medications like betaine to facilitate the breakdown of homocysteine Regular monitoring of blood homocysteine and methionine levels Addressing any physical or developmental complications through therapy and support services Ongoing medical evaluations to assess treatment effectiveness and adjust as needed
Clinical Advice & FAQs
Billing Guidance
Is E72.11 a billable ICD-10 code?
Yes, E72.11 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E72.11?
Clinical documentation must specify the nature of Homocystinuria and any associated comorbidities for accurate reporting.
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